Subject:
Biology
Material Type:
Full Course
Level:
Community College / Lower Division, College / Upper Division
Provider:
Rice University
Provider Set:
OpenStax College
Tags:
  • 3' UTR
  • 5' UTR
  • 7-methylguanosine Cap
  • A Branch Site
  • A Horizon
  • ABO Blood Type
  • ACE
  • ACTH
  • AChE
  • ADH
  • ADHD
  • ADP
  • AG Dinucleotide Region
  • AMP
  • ANP
  • APC
  • ATP
  • ATP Formation
  • ATP Hydrolysis
  • ATP Synthase
  • ATP Yield
  • AZT
  • Abduction
  • Abiotic
  • Aboveground Biomass
  • Abscisic Acid
  • Abscission
  • Absorption
  • Absorption Spectrum
  • Abstract
  • Abyssal Zone
  • Acanthostega
  • Accessory Fruit
  • Acclimatization
  • Acellular
  • Acetyl CoA
  • Acetylcholine
  • Acetylcholinesterase
  • Acid
  • Acid Rain
  • Acidophile
  • Acini
  • Acinus
  • Acoelomate
  • Acquired Trait
  • Acromegaly
  • Acrosomal Reaction
  • Actinopterygii
  • Action Potential
  • Action Potential Propagation
  • Activation Energy
  • Activator
  • Active Site
  • Active Transport
  • Acute
  • Adaptation
  • Adaptation to Land
  • Adaptive Evolution
  • Adaptive Immune Response
  • Adaptive Immune System
  • Adaptive Immunity
  • Adaptive Radiation
  • Add
  • Addison's Disease
  • Adduction
  • Adenosine Triphosphate
  • Adenylate Cyclase
  • Adhesion
  • Adipose Tissue
  • Adrenal Cortex
  • Adrenal Gland
  • Adrenal Medulla
  • Adrenocorticotropic Hormone
  • Adventitious Root
  • Aerobic Respiration
  • Afferent Arteriole
  • Affinity
  • Afrikaner
  • Age Structure
  • Aggregate Fruit
  • Aggressive Display
  • Agricultural Diversity
  • Air Sac
  • Air Sacs
  • Alcohol Fermentation
  • Aldolase
  • Aldosterone
  • Alfred Russel Wallace
  • Alfred Wallace
  • Algal Bloom
  • Alimentary Canal
  • Aliphatic Hydrocarbon
  • Alkaliphile
  • Allantois
  • Allele
  • Allele Frequency
  • Allergies
  • Allergy
  • Allopatric Speciation
  • Allopolyploidy
  • Allosteric Activator
  • Allosteric Inhibition
  • Allosteric Regulator
  • Alpha Cell
  • Alpha-helix Structure
  • Alteration
  • Alternation of Generations
  • Altitudinal Cline
  • Alveolar Duct
  • Alveolar P_(O_2 )
  • Alveolar Sac
  • Alveolar Ventilation
  • Alveolate
  • Alveoli
  • Alveolus
  • Alzheimer's Disease
  • Ambulacral System
  • Amino Acid
  • Amino Acid Derived Hormone
  • Aminoacyl-tRNA Synthetase
  • Aminopeptidase
  • Ammonia
  • Ammonotelic
  • Amnion
  • Amniote
  • Amniote Evolution
  • Amoeba
  • Amoebozoa
  • Amphiarthroses
  • Amphibian
  • Amphibian Evolution
  • Amphiphilic
  • Ampullae of Lorenzini
  • Amygdala
  • Amylase
  • Anabolic Pathway
  • Anaerobic
  • Anaerobic Cellular Respiration
  • Anaerobic Metabolism
  • Analogous Trait
  • Analogy
  • Analytical Model
  • Anaphase
  • Anaphase I
  • Anaphase II
  • Anapsid
  • Anatomical Dead Space
  • Anatomical Shunt
  • Ancient Atmosphere
  • Androecium
  • Androgen
  • Aneuploid
  • Aneuploidy
  • Angina
  • Angiosperm
  • Angiosperm Diversity
  • Angiosperm Evolution
  • Angiosperm Life Cycle
  • Angiosperm Lifecycle
  • Angiosperm Reproduction
  • Angiosperm Sexual Reproduction
  • Angiotensin Converting Enzyme
  • Angiotensin I
  • Angiotensin II
  • Angular Movement
  • Animal Biology
  • Animal Body
  • Animal Body Function
  • Animal Cell
  • Animal Characteristic
  • Animal Classification
  • Animal Development
  • Animal Digestion
  • Animal Diversity
  • Animal Energy
  • Animal Evolution
  • Animal Form
  • Animal Kingdom
  • Animal Parasite
  • Animal Pathogen
  • Animal Phylogeny
  • Animal Physiology
  • Animal Reproduction
  • Animal Size
  • Animal Speed
  • Animal Tissue
  • Anion
  • Annelid
  • Annelid Anatomy
  • Annelid Morphology
  • Annelida
  • Annual
  • Annual Ring
  • Anoxic
  • Antenna Molecule
  • Anterior Pituitary
  • Anther
  • Antheridium
  • Anthony Von Leeuwenhoek
  • Anthophyta
  • Anthozoa
  • Anthropoid
  • Anti-diuretic Hormone
  • Antibiotic
  • Antibiotic Resistance
  • Antibodies
  • Antibody
  • Antibody Class
  • Antibody Function
  • Antibody Structure
  • Anticodon
  • Antidiuretic Hormone
  • Antifungal
  • Antigen
  • Antigen-presenting Cell
  • Antioxidant
  • Antipodal
  • Antiporter
  • Antiviral Drug
  • Anura
  • Anus
  • Anvil
  • Aorta
  • Apex Consumer
  • Aphotic Zone
  • Apical Bud
  • Apical Meristem
  • Apicomplexan
  • Apocrine Gland
  • Apoda
  • Apodemes
  • Apomixis
  • Apoptosis
  • Appendicular Skeleton
  • Applied Science
  • Appositional Growth
  • Aquaporin
  • Aquatic Biome
  • Aquatic Environment
  • Aquatic Influence
  • Arachnoid Mater
  • Arbuscular Mycorrhiza
  • Archaea
  • Archaeopteryx
  • Archaeplastida
  • Archegonium
  • Archenteron
  • Archosaur
  • Arctic Tundra
  • Arcuate Artery
  • Areolar Connective Tissue
  • Aromatic Hydrocarbon
  • Arteriole
  • Artery
  • Arthropod
  • Arthropod Morphology
  • Arthropoda
  • Artificial Plant Reproduction
  • Ascending Limb
  • Asd
  • Asexual Reproduction
  • Asocarp
  • Asomycota
  • Assimilation
  • Assortative Mating
  • Asthma
  • Astrocyte
  • Asymmetry
  • Asymptomatic Infection
  • Atherosclerosis
  • Atmospheric Carbon Dioxide
  • Atom
  • Atomic Mass
  • Atomic Number
  • Atrial Natriuretic Peptide
  • Atrioventricular Valve
  • Atrium
  • Attention Deficit
  • Attention Deficit Disorder
  • Attention Deficit Hyperactivity Disorder
  • Attenuating
  • Audition
  • Auditory Ossicle
  • Australopithecus
  • Autism
  • Autism Spectrum Disorder
  • Autoantibody
  • Autocrine Signal
  • Autoimmune Response
  • Autoimmunity
  • Autoinducer
  • Autonomic Nervous System
  • Autopolyploidy
  • Autosomal Chromosome
  • Autosome
  • Autotroph
  • Auxin
  • Avian Digestion
  • Avidity
  • Axial Skeleton
  • Axillary Bud
  • Axon
  • Axon Hillock
  • Axon Terminal
  • B Cell
  • B Horizon
  • BMR
  • BP
  • BUN
  • Back Mutation
  • Bacteria
  • Bacterial Disease
  • Bacterial Fermentation
  • Bacteriophage
  • Balanced Chemical Equation
  • Ball-and-socket Joint
  • Barcoding
  • Basal Angiosperm
  • Basal Ganglia
  • Basal Metabolic Rate
  • Basal Nuclei
  • Basal Taxon
  • Base
  • Basic Science
  • Basidiocarp
  • Basidiomycota
  • Basidium
  • Basilar Membrane
  • Basophil
  • Bat Pollination
  • Batesian Mimicry
  • Behavioral Biology
  • Behavioral Isolation
  • Beneficial Allele
  • Benthic Realm
  • Beta Cell
  • Beta-pleated Sheet
  • Bicarbonate
  • Bicarbonate Buffer System
  • Biennial
  • Bilateral Symmetry
  • Bile
  • Binary Fission
  • Binomial Nomenclature
  • Biochemistry
  • Biodiversity
  • Biodiversity Crisis
  • Biodiversity Hotspot
  • Biodiversity Preservation
  • Bioenergetics
  • Bioethics
  • Biofilm
  • Biogeochemical Cycle
  • Biogeographer
  • Biogeography
  • Biological Carbon Cycle
  • Biological Carbon Pump
  • Biological Macromolecule
  • Biological Macromolecules
  • Biological Magnification
  • Biological Molecules
  • Biological Nitrogen Fixation
  • Biological Species Concept
  • Biology
  • Biology for Majors
  • Bioluminescence
  • Biomagnification
  • Biomarker
  • Biomass
  • Biome
  • Bioremediation
  • Biosphere
  • Biotechnology
  • Biotic
  • Biotic Potential
  • Bipolar Neuron
  • Biramous Appendage
  • Bird
  • Bird Evolution
  • Bird Pollination
  • Birth
  • Birth Control
  • Birth Rate
  • Biscuspid Valve
  • Bitter
  • Black Death
  • Blastocyst
  • Blastopore
  • Blastula
  • Blending Inheritance
  • Blood
  • Blood Calcium Level
  • Blood Flow
  • Blood Glucose
  • Blood Pressure
  • Blood Pressure Regulation
  • Blood Type
  • Blood Urea Nitrogen
  • Blood Vessel
  • Blue Light
  • Blue Light Response
  • Body Cavity
  • Body Defense
  • Body Motility
  • Body Plan
  • Body Plane
  • Body Regulation
  • Body Symmetry
  • Bohr Model
  • Boiling Point
  • Bolus
  • Bone
  • Bone Cell
  • Bone Growth
  • Bone Remodeling
  • Bone Repair
  • Bone Tissue
  • Bone Type
  • Bony Fish
  • Boreal Forest
  • Botany
  • Bottleneck Effect
  • Botulism
  • Bowman's Capsule
  • Boyle’s Law
  • Brachiation
  • Brain
  • Brain-computer Interface
  • Brainstem
  • Branch Point
  • Bronchi
  • Bronchiole
  • Bronchus
  • Brown Algae
  • Brumation
  • Bryophyte
  • Bryophyte Lifecycle
  • Bubonic Plague
  • Budding
  • Buffer
  • Bulb
  • Bulboid Corpuscle
  • Bulbourethral Gland
  • Bulbous Corpuscle
  • Bulk Transport
  • Bush Meat
  • C Horizon
  • C-protein-linked Receptor
  • C. Elegans
  • CA-MRSA
  • CAAT Box
  • CAMP
  • CAMP-dependent Kinase
  • CAP
  • CITES
  • CLASS
  • CSF
  • CTL
  • Caecilian
  • Calcification
  • Calcitonin
  • Calf Bone
  • Calorie
  • Calvin Cycle
  • Calvin-Benson Cycle
  • Calyx
  • Cambrian Explosion
  • Cambrian Period
  • Cancer
  • Cancer Biologist
  • Candela
  • Canopy
  • Capillary
  • Capillary Action
  • Capillary Bed
  • Capsid
  • Capsomeres
  • Capsule
  • Captacula
  • Captaculae
  • Cararrhini
  • Carbaminohemoglobin
  • Carbohydrate
  • Carbohydrate Classification
  • Carbohydrate Digestion
  • Carbohydrate Metabolic Pathway
  • Carbohydrates
  • Carbon
  • Carbon Cycle
  • Carbon Dating
  • Carbon Dioxide
  • Carbon Fixation
  • Carbon Monoxide
  • Carbonic Acid Intermediate
  • Carbonic Acid-bicarbonate Buffer System
  • Carbonic Anhydrase
  • Carboniferous Period
  • Carboxypeptidase
  • Cardiac Arrest
  • Cardiac Cycle
  • Cardiac Muscle
  • Cardiac Muscle Tissue
  • Cardiac Output
  • Cardiologist
  • Cardiomyocyte
  • Carl Linnaeus
  • Carl Woese
  • Carnivore
  • Carotenoid
  • Carpel
  • Carrier Protein
  • Carrying Capacity
  • Cartilage
  • Cartilaginous Fish
  • Cartilaginous Joint
  • Casineria
  • Casparian Strip
  • Catabolic Pathway
  • Catabolite Activator Protein
  • Catarrhini
  • Cation
  • Cdk
  • Cell
  • Cell Communication
  • Cell Cycle Checkpoint
  • Cell Cycle Control
  • Cell Cycle Regulation
  • Cell Division
  • Cell Function
  • Cell Growth
  • Cell Membranes
  • Cell Motion
  • Cell Necrosis
  • Cell Plate
  • Cell Recognition
  • Cell Reproduction
  • Cell Size
  • Cell Structure
  • Cell Suicide
  • Cell Theory
  • Cell Wall
  • Cell-cycle
  • Cell-mediated Immune Response
  • Cell-surface Receptor
  • Cells
  • Cellular Activity
  • Cellular Cloning
  • Cellular Energy
  • Cellular Metabolism
  • Cellular Receptor
  • Cellular Respiration
  • Cellulose
  • CentiMorgan
  • Central Dogma
  • Central Nervous System
  • Central Vacuole
  • Centriole
  • Centromere
  • Centrosome
  • Cephalic Phase
  • Cephalochordata
  • Cephalothorax
  • Cerebellum
  • Cerebral Cortex
  • Cerebral Hemisphere
  • Cerebrospinal Fluid
  • Chaetae
  • Chain Termination Method
  • Channel
  • Channel Protein
  • Chaparral
  • Chaperone
  • Chaperones
  • Characteristic
  • Charales
  • Chargaff's Rules
  • Charged Membrane
  • Charles Darwin
  • Charophyte
  • Checkpoint
  • Chelicerata
  • Chemical Bond
  • Chemical Diversity
  • Chemical Energy
  • Chemical Reaction
  • Chemical Reactivity
  • Chemical Signal
  • Chemical Synapse
  • Chemiosmosis
  • Chemisosmosis
  • Chemistry
  • Chemoautotroph
  • Chemosynthetic Organism
  • Chemotroph
  • Chesapeake Bay Ecosystem
  • Chiasma
  • Chiasmata
  • Chitin
  • Chlorarachniophytes
  • Chloride Shift
  • Chlorophyll
  • Chlorophyll a
  • Chlorophyll b
  • Chlorophyte
  • Chloroplast
  • Cholecystokinin
  • Chondrichthyes
  • Chondrocytes
  • Chordata
  • Chordate
  • Chorion
  • Choroid Plexus
  • Chromalveolata
  • Chromatid
  • Chromatin
  • Chromophore
  • Chromosomal Sympatric Speciation
  • Chromosomal Theory
  • Chromosomal Theory of Inheritance
  • Chromosome
  • Chromosome 18 Inversion
  • Chromosome Aberration
  • Chromosome Compaction
  • Chromosome Disorder
  • Chromosome Identification
  • Chromosome Inversion
  • Chromosome Map
  • Chromosome Nondisjunction
  • Chromosome Number Disorder
  • Chronic
  • Chylomicron
  • Chyme
  • Chymotrypsin
  • Chytrid
  • Chytridiomycosis
  • Chytridiomycota
  • Cilia
  • Ciliate
  • Cilium
  • Cingulate Gyrus
  • Cingulated Gyrus
  • Circadian
  • Circular Pathway
  • Circulation
  • Circulatory System
  • Circumduction
  • Cis-acting Element
  • Citric Acid Cycle
  • Clade
  • Cladistic Method
  • Cladistics
  • Cladistics System
  • Classical Conditioning
  • Classical Genetics
  • Classification Levels
  • Classification System
  • Clathrate
  • Clathrin
  • Clavicle
  • Clay
  • Cleavage
  • Cleavage Furrow
  • Climate
  • Climate Change
  • Climax Community
  • Cline
  • Clinical Trial
  • Clitellum
  • Clitoris
  • Cloaca
  • Clonal Selection
  • Clone
  • Closed Circulatory System
  • Closed System
  • Club Fungi
  • Club Moss
  • Cnidaria
  • Cnidarian
  • Cnidocyte
  • Cns
  • Co-transport
  • Coagulation
  • Codominance
  • Codon
  • Coelenteron
  • Coelom
  • Coelom Evolution
  • Coelomate
  • Coenocytic Hypha
  • Coenzyme
  • Coenzyme a
  • Coevolution of Plants and Mycorrhizae
  • Cofactor
  • Cognitive Learning
  • Cohesin
  • Cohesion
  • Coleoptile
  • Coleorhiza
  • Colinear
  • College Biology
  • Collenchyma Cell
  • Colloid
  • Columnar Epithelia
  • Commensalism
  • Common Side-blotched Lizards
  • Community
  • Community Ecology
  • Community Structure
  • Community Succession
  • Compact Bone Tissue
  • Competitive Exclusion
  • Competitive Exclusion Principle
  • Competitive Inhibition
  • Complement System
  • Complete Flower
  • Complex I
  • Complex II
  • Complex III
  • Complex IV
  • Complex Plant Tissue
  • Complex Tissue Structure
  • Compliance
  • Compound
  • Compound Leaf
  • Concentration Gradient
  • Conceptual Model
  • Conclusion
  • Condensation
  • Condensation Reaction
  • Condensin
  • Conditioned Behavior
  • Condyloid Joint
  • Cone
  • Conifer Life Cycle
  • Conifer Lifecycle
  • Conjugated Fungi
  • Conjugation
  • Connective Tissue
  • Consensus
  • Conservation
  • Conspecific
  • Conspiral
  • Contig
  • Continuous Variation
  • Contour Feather
  • Contraception
  • Contractile Vacuole
  • Control
  • Control of Homeostasis
  • Convergent Evolution
  • Coral Reef
  • Core Enzyme
  • Corm
  • Cornea
  • Corolla
  • Coronal Plane
  • Coronary Artery
  • Coronary Vein
  • Corpus Callosum
  • Cortex
  • Cortical Nephron
  • Cortical Radiate Artery
  • Corticosteroid
  • Cortisol
  • Cotyledon
  • Countercurrent Exchanger
  • Countercurrent Multiplier
  • Courtship Display
  • Covalent Bond
  • Coxal Bone
  • Cranial Bone
  • Cranial Nerve
  • Craniata
  • Craniate
  • Cranium
  • Crocodilia
  • Crop
  • Cross-pollination
  • Cross-reactivity
  • Crossing Over
  • Crossover
  • Crustacea
  • Cryogenian Period
  • Cryptochrome
  • Cryptofauna
  • Ctenidia
  • Cuboidal Epithelia
  • Cubozoa
  • Cushing's Disease
  • Cutaneous Respiration
  • Cuticle
  • Cutting
  • Cyanobacteria
  • Cycad
  • Cyclic AMP
  • Cyclin
  • Cyclin-dependent Kinase
  • Cypris
  • Cytochrome Complex
  • Cytochrome c
  • Cytokine
  • Cytokine Release
  • Cytokinesis
  • Cytokinin
  • Cytopathic
  • Cytoplasm
  • Cytoplasmic Streaming
  • Cytoskeleton
  • Cytosol
  • Cytotechnologist
  • Cytotoxic T Lymphocyte
  • DAG
  • DCT
  • DNA
  • DNA Analysis
  • DNA Barcoding
  • DNA Extraction
  • DNA Function
  • DNA Methylation
  • DNA Microarray
  • DNA Repair
  • DNA Replication
  • DNA Sequencing
  • DNA Structure
  • DNA Transformation
  • Dark Reaction
  • Daughter Nuclei
  • Dead Sea
  • Dead Space
  • Dead Zone
  • Death Rate
  • Decalcification
  • Decomposer
  • Decomposition
  • Deductive Reasoning
  • Defense Mechanism
  • Deforestation
  • Degeneracy
  • Dehydration
  • Dehydration Reaction
  • Dehydration Synthesis
  • Delivery
  • Delta G
  • Demography
  • Denaturation
  • Dendrite
  • Dendritic Cell
  • Denitrification
  • Density-dependent Growth
  • Density-dependent Regulation
  • Density-independent Growth
  • Density-independent Regulation
  • Dentary
  • Deoxynucleotide
  • Deoxyribonucleic Acid
  • Dephosphorylation
  • Depolarization
  • Depression
  • Dermal Tissue
  • Descending Limb
  • Descriptive Science
  • Desmosome
  • Determinate Cleavage
  • Detrital Food Web
  • Deuteromycota
  • Deuterostome
  • Development of the Seed
  • Diabetes Insipidus
  • Diabetes Mellitus
  • Diabetogenic Effect
  • Diacylglycerol
  • Dialysis
  • Diaphragm
  • Diaphysis
  • Diarthroses
  • Diastole
  • Diatom
  • Dicer
  • Dideoxynucleotide
  • Diffusion
  • Digestion
  • Digestion Regulation
  • Digestive Process
  • Digestive System
  • Dihybrid
  • Dikaryon
  • Dimer
  • Dimerization
  • Dinoflagellate
  • Dioecious
  • Dipeptidase
  • Diphyodont
  • Diploblast
  • Diploid
  • Diploid Dominant
  • Diploid Zygote
  • Diplomonad
  • Diplontic
  • Direct Diffusion
  • Directional Selection
  • Disaccharide
  • Discontinuous Variation
  • Discussion
  • Disease Migration
  • Disease Prediction
  • Disorder
  • Dispersal
  • Dissociation
  • Distal Convoluted Tubule
  • Distraction Display
  • Divergent Evolution
  • Diversifying Selection
  • Divisions of Land Plants
  • Domain
  • Dominant
  • Dominant Allele
  • Dominant Lethal
  • Dominant Phenotype
  • Dormancy
  • Dorsal Cavity
  • Dorsal Hollow Nerve Cord
  • Dorsiflexion
  • Double Circulation
  • Double Fertilization
  • Double Helix
  • Down Feather
  • Down-regulation
  • Downstream
  • Duodenum
  • Dura Mater
  • Dutch Elm Disease
  • E. O. Wilson
  • ECG
  • ELISA
  • ENergy
  • EPSP
  • ER
  • Ear Drum
  • Early Plant Life
  • Early Reproduction
  • Eccrine Gland
  • Echinoderm
  • Echinoderm Anatomy
  • Echinoderm Excretory System
  • Echinoderm Morphology
  • Echinoderm Nervous System
  • Echinoderm Reproduction
  • Echinodermata
  • Ecological Efficiency
  • Ecological Pyramid
  • Ecological Research
  • Ecological Resilience
  • Ecological Resistance
  • Ecological Study
  • Ecologist
  • Ecology
  • Ecology Study
  • Ecology of Ecosystems
  • Ecosystem
  • Ecosystem Diversity
  • Ecosystem Dynamics
  • Ecosystem Ecology
  • Ecosystem Energy
  • Ecosystem Energy Flow
  • Ecosystem Energy Model
  • Ecosystem Experiment
  • Ecosystem Model
  • Ecosystem Modeling
  • Ecosystem Service
  • Ecosystem Structure
  • Ecosystems
  • Ectoderm
  • Ectomycorrhiza
  • Ectotherm
  • Ediacaran Period
  • Effector Cell
  • Efferent Arteriole
  • Egress
  • Elastase
  • Elastic Recoil
  • Elastic Work
  • Electrical Synapse
  • Electrocardiogram
  • Electrochemical Gradient
  • Electrolyte
  • Electrolyte Transport
  • Electrolytes
  • Electromagnetic Spectrum
  • Electron
  • Electron Configuration
  • Electron Microscope
  • Electron Orbital
  • Electron Transfer
  • Electron Transport Chain
  • Electronegativity
  • Electrophoresis
  • Element
  • Elevation
  • Elimination
  • Elizabeth Blackburn
  • Eltonian Pyramid
  • Embryo
  • Embryological Development
  • Embryonic Animal Tissue
  • Embryonic Development
  • Embryophyte
  • Emergent Vegetation
  • Emerging Disease
  • Emsleyan/Mertensian Mimicry
  • Enantiomers
  • Enantiornithes
  • Endangered Species Act
  • Endemic
  • Endemic Disease
  • Endemic Species
  • Endergonic
  • Endergonic Reaction
  • Endocardium
  • Endocarp
  • Endochondral Ossification
  • Endocrine
  • Endocrine Cell
  • Endocrine Gland
  • Endocrine System
  • Endocrinologist
  • Endocytosis
  • Endoderm
  • Endodermis
  • Endomembrane System
  • Endoplasmic Reticulum
  • Endoskeleton
  • Endosperm
  • Endosymbiosis
  • Endotherm
  • Energy Budget
  • Energy Change
  • Energy Currency
  • Energy Cycle
  • Energy From Fat
  • Energy Requirements
  • Energy Source
  • Energy System
  • Energy Transfer
  • Energy of Activation
  • Enhancer
  • Enolase
  • Enterocoelous Coelom
  • Enterocoely
  • Enthalpy
  • Entropy
  • Envelope
  • Enveloped Virions
  • Enveloped Viruses
  • Environmental Adaptation
  • Environmental Disturbance
  • Environmental Variance
  • Enzymatic Cascade
  • Enzyme
  • Enzyme Active Site
  • Enzyme Function
  • Enzyme Regulation
  • Enzyme-linked Immunosorbent Assay
  • Enzyme-linked Receptor
  • Eosinophil
  • Ependymal
  • Epicardium
  • Epicotyl
  • Epidemic
  • Epidemiologist
  • Epigeal Germination
  • Epigenetic
  • Epigenetic Control
  • Epigenetic Gene Regulation
  • Epigenetic Regulation
  • Epilepsy
  • Epinephrine
  • Epiphyseal Plate
  • Epiphyses
  • Epiphyte
  • Epistasis
  • Epistatic Effect
  • Epithelial Tissue
  • Epitope
  • Epo
  • Equilibrium
  • Erythropoietin
  • Esophagus
  • Essential Element
  • Essential Nutrient
  • Estivation
  • Estrogen
  • Estuaries
  • Estuary
  • Ethnobotanist
  • Ethology
  • Ethylene
  • Etoliation
  • Eucoelomate
  • Eudicot
  • Eukaryote
  • Eukaryote Evolution
  • Eukaryote HGT
  • Eukaryote Origin
  • Eukaryote-first Hypothesis
  • Eukaryotes
  • Eukaryotic Cell
  • Eukaryotic DNA
  • Eukaryotic Epigenetic Gene Regulation
  • Eukaryotic Gene Expression
  • Eukaryotic Gene Regulation
  • Eukaryotic Genome
  • Eukaryotic Initiation Factor-2
  • Eukaryotic Post-transcriptional Gene Regulation
  • Eukaryotic Post-translational Gene Regulation
  • Eukaryotic Transcription
  • Eukaryotic Transcriptional Gene Regulation
  • Eukaryotic Translational Gene Regulation
  • Eumatozoa
  • Euploid
  • Eutherian Mammal
  • Eutheruan Mammal
  • Eutrophication
  • Evaporation
  • Evapotranspiration
  • Eversion
  • Evolution
  • Evolution Evidence
  • Evolution Theory
  • Evolution of Land Plants
  • Evolution of Reproduction
  • Evolutionary Fitness (also, Darwinian Fitness)
  • Evolutionary Relationships
  • Evolutionary Thought
  • Evolving New Species
  • Excavata
  • Excitation–contraction Coupling
  • Excitatory Postsynaptic Potential
  • Excretory System
  • Exergonic
  • Exergonic Reaction
  • Exhalation
  • Exine
  • Exocarp
  • Exocrine Gland
  • Exocrine System
  • Exocytosis
  • Exon
  • Exoskeleton
  • Exotic Species
  • Experiment
  • Expiratory Reserve Volume
  • Exponential Growth
  • Extant
  • Extension
  • External Fertilization
  • Extinct
  • Extinct Plant
  • Extinction
  • Extinction Rate
  • Extracellular Domain
  • Extracellular Matrix
  • Extremophile
  • Eye
  • Eye Anatomy
  • F1
  • F2
  • FAD
  • FADH
  • FEV1/FVC Ratio
  • FSH
  • Facial Bone
  • Facilitated Transport
  • Fact
  • Fall Turnover
  • Fall and Spring Turnover
  • Fallout
  • False Negative
  • Falsifiable
  • Family
  • Fanconi Anemia (FA)
  • Fat
  • Fat Digestion
  • Fatty Acid
  • Fecundity
  • Feedback Inhibition
  • Female Gamete
  • Female Gametophyte
  • Female Hormones
  • Female Reproductive Anatomy
  • Femur
  • Fermentation
  • Fern
  • Fern Lifecycle
  • Fertilization
  • Fetal Development
  • Fibrous Connective Tissue
  • Fibrous Joint
  • Fibrous Root
  • Fibula
  • Field Biologist
  • Filament
  • Filamentous Viruses
  • First Filial Generation
  • First Gap
  • First Law of Thermodynamics
  • First Messenger
  • Fish
  • Fisherian Runaway Model
  • Fisher’s Runaway Model
  • Fishes
  • Fission
  • Fitness
  • Five Senses
  • Fixation
  • Fixed Action Pattern
  • Flagella
  • Flagellum
  • Flame Cell
  • Flat Bone
  • Flatworm
  • Flavin
  • Flexion
  • Flight Feather
  • Float
  • Flow-resistive
  • Flower
  • Flower Evolution
  • Flower Reproduction
  • Flower Structure
  • Flu Shot
  • Flu Strain
  • Fluid Mosaic Model
  • Follicle Stimulating Hormone
  • Follicle-stimulating Hormone (FSH)
  • Food Chain
  • Food Chain Energy
  • Food Energy
  • Food Fungi
  • Food Production
  • Food Requirements
  • Food Web
  • Food Web Energy
  • Foodborne Disease
  • Foraging
  • Foram
  • Foraminiferan
  • Forced Expiratory Volume
  • Forced Vital Capacity
  • Forearm
  • Foreign DNA
  • Forked-line Method
  • Foundation Species
  • Founder Effect
  • Fovea
  • Fragmentation
  • Francis Crick
  • Free Energy
  • Free Nerve Ending
  • Frequency-dependent Selection
  • Freshwater Biome
  • Friedrich Miescher
  • Frog
  • Frontal Lobe
  • Frontal Plane
  • Fruit
  • Fruit Development
  • Fruit Dispersal
  • Fruit Evolution
  • Fruit Type
  • FtsZ
  • Fumarate
  • Functional Group
  • Functional Residual Capacity
  • Functional Vital Capacity
  • Fungal Infection
  • Fungal Parasite
  • Fungal Pathogen
  • Fungi
  • Fungi Asexual Reproduction
  • Fungi Beverage
  • Fungi Cell Structure
  • Fungi Characteristics
  • Fungi Ecology
  • Fungi Growth
  • Fungi Habitat
  • Fungi Nutrition
  • Fungi Reproduction
  • Fungi Sexual Reproduction
  • Fungi and Roots
  • Fungivore
  • Fungus
  • Fungus Animal Mutualism
  • Fungus Plant Mutualism
  • Furcula
  • Fusiform
  • Fusion
  • G-protein
  • G0 Phase
  • G1
  • G1 Checkpoint
  • G1 Phase
  • G2
  • G2 Checkpoint
  • G2 Phase
  • GC-rich Box
  • GFR
  • GH
  • GHIH
  • GHRH
  • GLUT Protein
  • GMO
  • GTA
  • GTP
  • GU Dinucleotide Signal
  • Gallbladder
  • Galls
  • Gametangium
  • Gamete
  • Gamete Genotype
  • Gametic Barrier
  • Gametogenesis
  • Gametophyte
  • Gap Junction
  • Garden Pea
  • Garden Pea Hybridization
  • Garth Nicholson
  • Gas
  • Gas Equation
  • Gas Exchange
  • Gas Pressure
  • Gastric Inhibitory Peptide
  • Gastric Phase
  • Gastrin
  • Gastrovascular Cavity
  • Gastrula
  • Gastrulation
  • Gel Electrophoresis
  • Gemma
  • Gemmule
  • Gene
  • Gene Cross
  • Gene Distance
  • Gene Expression
  • Gene Expression Regulation
  • Gene Flow
  • Gene Pool
  • Gene Regulation
  • Gene Targeting
  • Gene Therapy
  • Gene Transfer Agent
  • Genes
  • Genetic Code
  • Genetic Diagnosis
  • Genetic Diversity
  • Genetic Drift
  • Genetic Engineering
  • Genetic Linkage
  • Genetic Map
  • Genetic Recombination
  • Genetic Structure
  • Genetic Testing
  • Genetic Variance
  • Genetic Variation
  • Genetically Modified Organism
  • Geneticist
  • Genetics
  • Genome
  • Genome Annotation
  • Genome Fusion
  • Genomic DNA
  • Genomics
  • Genotype
  • Genus
  • Geographical Variation
  • Geological Carbon Cycle
  • Geological Climate Change
  • Geometric Isomer
  • Germ Cell
  • Germ Layer
  • Germ Layers
  • Germination
  • Gestation
  • Gibberellin
  • Gibbs Free Energy
  • Gigantism
  • Gill Circulation
  • Gills
  • Gingko Biloba
  • Gingkophyte
  • Gizzard
  • Glabrous
  • Glia
  • Glia Function
  • Glia Types
  • Glial Cell
  • Gliding Movement
  • Global Climate
  • Global Climate Change
  • Global Warming
  • Glomeromycota
  • Glomerular Filtration
  • Glomerular Filtration Rate
  • Glomerulus
  • Glucagon
  • Glucocorticoid
  • Gluconeogenesis
  • Glucose
  • Glucose Breakdown
  • Glucose Metabolism
  • Glucose Transport Protein
  • Glucose-sparing Effect
  • Glycogen
  • Glycogenolysis
  • Glycolipid
  • Glycolysis
  • Glycolysis Regulation
  • Glycoprotein
  • Glycosidic Bond
  • GnRH
  • Gnathostome
  • Gnetophyte
  • Goiter
  • Golgi Apparatus
  • Golgi Tendon Organ
  • Gomphoses
  • Gonadotropin
  • Gonadotropin-releasing Hormone
  • Good Genes Hypothesis
  • Gout
  • Gradual Speciation Model
  • Gradual Species Model
  • Grafting
  • Gram Molecular Weight
  • Gram Negative
  • Gram Positive
  • Grana
  • Granular Cell
  • Granum
  • Granzyme
  • Gravitropism
  • Grazing Food Web
  • Green Algae
  • Green Algae Reproduction
  • Greenhouse Effect
  • Greenhouse Gas
  • Gregor Mendel
  • Gross Primary Productivity
  • Ground Tissue
  • Group I
  • Group II
  • Group III
  • Group IV
  • Group VI
  • Group VII
  • Group v
  • Growth Factor
  • Growth Hormone
  • Growth Hormone-inhibiting Hormone
  • Growth Hormone-releasing Hormone
  • Growth Regulation
  • Growth Regulator
  • Guanine Diphosphate
  • Guanine Triphosphate
  • Guard Cell
  • Gustation
  • Guttation
  • Gymnosperm
  • Gymnosperm Diversity
  • Gymnosperm Evolution
  • Gymnosperm Reproduction
  • Gymnosperm Seed
  • Gymnosperm Sexual Reproduction
  • Gynoecium
  • Gyri
  • Gyrus
  • HGT
  • HIV
  • Habitat Isolation
  • Habitat Loss
  • Habitat Restoration
  • Habituation
  • Hagfish
  • Hairpin
  • Halophile
  • Hammer
  • Handicap Principle
  • Haplodiplodontic
  • Haploid
  • Haploid Dominant
  • Haplontic
  • Hardy-Weinberg Equilibrium
  • Haustoria
  • Haversian Canal
  • Haze-effect Cooling
  • Head and Tail Viruses
  • Hearing
  • Heart
  • Heart Anatomy
  • Heart Attack
  • Heart Structure
  • Heat
  • Heat Conservation
  • Heat Dissipation
  • Heat Energy
  • Heat of Vaporization of Water
  • Heirloom Plant
  • Heirloom Seed
  • Helicase
  • Helper T Cell
  • Helper T Lymphocyte
  • Heme Group
  • Hemizygous
  • Hemocoel
  • Hemoglobin
  • Hemolymph
  • Herb
  • Herbaceous Plant
  • Herbivore
  • Herbivory
  • Heredity
  • Heritability
  • Hermaphrodite
  • Hermaphroditism
  • Heteroautotroph
  • Heterodont
  • Heterogeneity
  • Heterospecific
  • Heterosporous
  • Heterosporous Seed Plant
  • Heterothallic
  • Heterotroph
  • Heterozygous
  • Hexapoda
  • Hexokinase
  • Hibernation
  • Hilum
  • Hinge Joint
  • Hip Bone
  • Hippocampus
  • Histone
  • Histone Acetylation
  • Histone Modification
  • Histone Protein
  • Holistic Ecosystem Model
  • Holoblastic
  • Holoenzyme
  • Homeobox Gene
  • Homeostasis
  • Homeostatic Process
  • Hominin
  • Hominoid
  • Homo
  • Homo Sapiens
  • Homo Sapiens Sapiens
  • Homologous Chromosome
  • Homologous Recombination
  • Homologous Structure
  • Homologous Trait
  • Homoplasy
  • Homosporous
  • Homothallic
  • Homozygous
  • Honest Signal
  • Horizon
  • Horizontal Gene Transfer
  • Horizontal Plane
  • Horizontal Transmission
  • Hormonal Response
  • Hormonal Stimuli
  • Hormone
  • Hormone Production
  • Hormone Receptor
  • Hormone Regulation
  • Hornwort
  • Horsetail
  • Horticulture
  • Host
  • Host DNA
  • Hox Gene
  • Hugh Davson
  • Human Beta Chorionic Gonadotropin
  • Human Birth
  • Human Carrying Capacity
  • Human Population
  • Human Population Growth
  • Human Pregnancy
  • Human Reproductive Anatomy
  • Human Skeletal System
  • Human Skeleton
  • Humerus
  • Humoral Immune Response
  • Humoral Stimuli
  • Humus
  • Huntington's Disease
  • Hybrid
  • Hybrid Sterility
  • Hybrid Viability
  • Hybrid Zone
  • Hybridization
  • Hydrocarbon
  • Hydrocarbon Chain
  • Hydrogen Bond
  • Hydrogenosome
  • Hydrologic Cycle
  • Hydrolysis
  • Hydrolysis Reaction
  • Hydrophilic
  • Hydrophilic Head
  • Hydrophobic
  • Hydrophobic Tail
  • Hydroponics
  • Hydrostatic Skeleton
  • Hydrothermal Vent
  • Hydrozoa
  • Hylobatidae
  • Hylonomus
  • Hyoid Bone
  • Hyperextension
  • Hyperglycemia
  • Hyperopia
  • Hyperplasia
  • Hyperpolarization
  • Hypersensitivities
  • Hypersensitivity
  • Hyperthermophile
  • Hyperthyroidism
  • Hypertonic
  • Hypha
  • Hyphae
  • Hypocotyl
  • Hypogeal Germination
  • Hypoglycemia
  • Hypophyseal Portal System
  • Hypoplasia
  • Hypothalamus
  • Hypothesis
  • Hypothesis-based Science
  • Hypothyroidism
  • Hypotonic
  • IGF
  • IP3
  • IPSP
  • Ice
  • Ileum
  • Immune Response
  • Immune System
  • Immune Tolerance
  • Immunity
  • Immunodeficiency
  • Immunologist
  • Imperfect Fungi
  • Importance of Biodiversity
  • Imprinting
  • Inbreeding
  • Inbreeding Depression
  • Incompatibility
  • Incompatibility Gene
  • Incomplete Dominance
  • Incus
  • Independent Assortment
  • Indeterminate Cleavage
  • Induced Fit
  • Induced Mutation
  • Inducer
  • Inducible Operon
  • Inductive Reasoning
  • Industrial Fungi
  • Industrial Plant Use
  • Industrial Revolution
  • Inert Gas
  • Inferior Vena Cava
  • Infertility
  • Inflammation
  • Infundibulum
  • Ingestion
  • Inhalation
  • Inheritance
  • Inherited Disorder
  • Inhibin
  • Inhibition of Cell Division
  • Inhibitor
  • Inhibitory Postsynaptic Potential
  • Inhibitory Postsynaptic Potential IPSP
  • Initiation Complex
  • Initiation Site
  • Initiation of Cell Division
  • Initiator TRNA
  • Innate Behavior
  • Innate Immune Response
  • Innate Immune System
  • Innate Immunity
  • Inner Cell Mass
  • Inner Ear
  • Inorganic Compound
  • Inorganic Nutrient
  • Inositol Phospholipid
  • Inositol Triphosphate
  • Insect Pollination
  • Insectivorous
  • Insectivorous Plant
  • Inspiratory Capacity
  • Inspiratory Reserve Volume
  • Insulin
  • Insulin-like Growth Factors
  • Integral Protein
  • Integrin
  • Integument
  • Integumentary System
  • Intercalary Meristem
  • Intercellular Signal
  • Intercostal Muscle
  • Interdisciplinary Ecology
  • Interferon
  • Interkinesis
  • Interlobar Artery
  • Intermediate Filament
  • Intermittent
  • Internal Fertilization
  • Internal Receptor
  • Internode
  • Interphase
  • Intersexual Selection
  • Interspecific Competition
  • Interstitial Cell of Leydig
  • Interstitial Fluid
  • Intertidal Zone
  • Intervertebral Disc
  • Intestinal Phase
  • Intine
  • Intracellular Hormone Receptor
  • Intracellular Mediator
  • Intracellular Receptor
  • Intracellular Signal
  • Intramembranous Ossification
  • Intrapleural Space
  • Intrasexual Selection
  • Intraspecific Competition
  • Introduction
  • Intron
  • Inversion
  • Invertebrata
  • Invertebrate
  • Invertebrates
  • Ion
  • Ion Channel-linked Receptor
  • Ionic Bond
  • Iris
  • Irregular Bone
  • Irreversible Chemical Reaction
  • Island Biogeography
  • Islets of Langerhans
  • Isomerase
  • Isomers
  • Isometric Viruses
  • Isotonic
  • Isotope
  • Isthmus
  • Iteroparity
  • J-shaped Growth Curve
  • James Danielli
  • James Lake
  • James Watson
  • Jasmonate
  • Jawed Fish
  • Jawless Fish
  • Jean-Baptiste Lamarck
  • Jejunum
  • Johannes Diderik Van Der Waals
  • Joint
  • Joint Function
  • Joint Movement
  • Joint Structure
  • Josiah Willard Gibbs
  • Just Noticeable Difference
  • Juxtaglomerular Complex
  • Juxtamedullary Nephron
  • K-selected Species
  • Karyogamy
  • Karyogram
  • Karyokinesis
  • Karyotype
  • Keratinocyte
  • Keystone Species
  • Kidney
  • Kidney Function
  • Kidney Physiology
  • Killed Vaccine
  • Kin Selection
  • Kinase
  • Kinase PKC
  • Kinesis
  • Kinesthesia
  • Kinetic Energy
  • Kinetochore
  • Kinetoplast
  • Kingdom
  • Kingdom Animalia
  • Kneecap
  • Kozak's Rules
  • Krause End Bulb
  • Krebs Cycle
  • Kyoto Protocol
  • LH
  • LTD
  • Labia Majora
  • Labia Minora
  • Labor
  • Labyrinth
  • Lac Operon
  • Lactase
  • Lactate Dehydrogenase
  • Lactic Acid Fermentation
  • Lacunae
  • Lagging Strand
  • Lake
  • Lamellae
  • Lamina
  • Laminaria
  • Lamprey
  • Lancelet
  • Land Adaptation
  • Land Plant Adaptations
  • Landscape Designer
  • Large 60S Ribosomal Subunit
  • Large Intestine
  • Larynx
  • Late Reproduction
  • Latency
  • Lateral Gene Transfer
  • Lateral Line
  • Lateral Meristem
  • Lateral Rotation
  • Latitudinal Cline
  • Law of Dominance
  • Law of Independent Assortment
  • Law of Mass Action
  • Law of Segregation
  • Law of Thermodynamics
  • Laws of Inheritance
  • Laws of Probability
  • Layering
  • Lead Structure
  • Leading Strand
  • Leaf
  • Leaf Adaptation
  • Leaf Anatomy
  • Leaf Arrangement
  • Leaf Form
  • Leaf Function
  • Leaf Structure
  • Leaf Vein
  • Learned Behavior
  • Leaves
  • Lens
  • Lenticel
  • Lepidosaur
  • Leptin
  • Lethality
  • Lichen
  • Life
  • Life History
  • Life History Pattern
  • Life Science
  • Life Table
  • Lifecycle
  • Ligand
  • Ligand Binding
  • Ligase
  • Light
  • Light Energy
  • Light Microscope
  • Light Transduction
  • Light Wavelengths
  • Light-dependent Reaction
  • Light-independent Reaction
  • Lignin
  • Limbic System
  • Linear Pathway
  • Linkage
  • Linked Genes
  • Linnaean System
  • Lipase
  • Lipid
  • Lipid Derived Hormone
  • Lipid Metabolic Pathway
  • Lipids
  • Liquid
  • Litmus Paper
  • Live Vaccine
  • Liver
  • Liverwort
  • Loam
  • Lobe-finned Fish
  • Lobes of the Kidney
  • Lock and Key Model
  • Locomotion
  • Locus
  • Logistic Growth
  • Long Bone
  • Long Term Depression
  • Long-term Potentiation
  • Long-term Stress Response
  • Loop of Henle
  • Loose Connective Tissue
  • Lophotrochozoa
  • Lower Limb
  • Ltp
  • Lung Capacity
  • Lung Volume
  • Luteinizing Hormone
  • Lycophyta
  • Lymph
  • Lymph Node
  • Lymphocyte
  • Lysis
  • Lysis Buffer
  • Lysogenic Cycle
  • Lysosome
  • Lytic Cycle
  • M Checkpoint
  • MALT
  • MHC
  • MHC I
  • MHC II
  • MRNA
  • MRSA
  • Maclyn McCarty
  • Macroevolution
  • Macromolecule
  • Macromolecule Synthesis
  • Macromolecules
  • Macronutrient
  • Macrophage
  • Macula Densa
  • Madreporite
  • Main Bronchus
  • Major Depression
  • Major Histocompatability Class I Molecule
  • Major Histocompatability Class II Molecule
  • Male Gametophyte
  • Male Hormones
  • Male Reproductive Anatomy
  • Malleus
  • Malpighian Tube
  • Malpighian Tubule
  • Maltase
  • Mammal
  • Mammal Characteristics
  • Mammal Evolution
  • Mammary Gland
  • Mantle
  • Marilee Ramesh
  • Marine Biome
  • Mark and Recapture
  • Marsupial
  • Mass Extinction
  • Mass Number
  • Mast Cell
  • Materials and Methods
  • Mating Factor
  • Matrix
  • Matrix Proteins
  • Matter
  • Matthias Schleiden
  • Maximal Exhalation
  • Maximum Parsimony
  • Measuring Biodiversity
  • Mechanoreceptor
  • Mechanoreceptor Density
  • Medial Rotation
  • Medulla
  • Medusa
  • Megafauna
  • Megapascal
  • Megaphyll
  • Megasporangium
  • Megaspore
  • Megasporocyte
  • Meiosis
  • Meiosis I
  • Meiosis II
  • Meissner’s Corpuscle
  • Membrane Components
  • Membrane Fluidity
  • Membrane Function
  • Membrane Potential
  • Membrane Structure
  • Memory Cell
  • Mendel
  • Mendelian Cross
  • Mendelian Genetics
  • Meninge
  • Menopause
  • Menstrual Cycle
  • Mental Illness
  • Meristem
  • Meristematic Tissue
  • Merkel's Disc
  • Meroblastic
  • Meselson
  • Mesocarp
  • Mesocosm
  • Mesoderm
  • Mesoglea
  • Mesohyl
  • Mesophyll
  • Messenger RNA
  • Metabolic Pathway
  • Metabolism
  • Metabolism Regulation
  • Metabolism Without Oxygen
  • Metabolome
  • Metabolomics
  • Metagenomics
  • Metamerism
  • Metaphase
  • Metaphase I
  • Metaphase II
  • Metaphase Plate
  • Metatarsal
  • Metazoa
  • Metazoan Phylogenetic Tree
  • MiRNA
  • MicroRNA
  • Microbial Genomics
  • Microbial Mat
  • Microbiologist
  • Microbiology
  • Microcosm
  • Microevolution
  • Microfilament
  • Microglia
  • Micronutrient
  • Microphyll
  • Micropropagation
  • Micropyle
  • Microsatellite Polymorphism
  • Microscope
  • Microscopy
  • Microsporangium
  • Microspore
  • Microsporocyte
  • Microsporophyll
  • Microtubule
  • Microvilli
  • Middle Ear
  • Midsagittal Plane
  • Migration
  • Migratory Bird Act
  • Milankovitch Cycle
  • Milliequivalent
  • Milliequivalents Per Liter
  • Milliosmole
  • Mineral
  • Mineral Soil
  • Mineralocorticoid
  • Mismatch Repair
  • Mitochondria
  • Mitochondria-first Hypothesis
  • Mitochondrial Disease
  • Mitochondrial Genomics
  • Mitosis
  • Mitosome
  • Mitotic Phase
  • Mitotic Spindle
  • Mitral Valve
  • Mixotroph
  • Mobility
  • Model Organism
  • Model System
  • Modern Synthesis
  • Modified Root
  • Modified Stem
  • Molality
  • Molarity
  • Mold
  • Mole
  • Molecular Biology
  • Molecular Catalyst
  • Molecular Cloning
  • Molecular Comparison
  • Molecular Structure
  • Molecular Systematics
  • Molecule
  • Mollusca
  • Monocarpic
  • Monocot
  • Monocyte
  • Monoecious
  • Monogamy
  • Monogastric
  • Monohybrid
  • Monohybrid Cross
  • Monomer
  • Monosaccharide
  • Monosomy
  • Monotreme
  • Monovary
  • Morning Sickness
  • Mortality Rate
  • Moss
  • Motor End Plate
  • Muc Protein
  • Mucin
  • Mucosa-associated Lymphoid Tissue
  • Mucus
  • Mullerian Mimicry
  • Multihybrid Fertilization
  • Multiple Alleles
  • Multiple Cloning Site
  • Multiple Fruit
  • Muscle Contraction
  • Muscle Fiber Structure
  • Muscle Spindle
  • Muscle Tension
  • Muscle Tissue
  • Muscle Type
  • Muscular System
  • Musculoskeletal System
  • Mutant
  • Mutation
  • Mutual Relationship
  • Mutualism
  • Myc
  • Mycelium
  • Mycetismus
  • Mycologist
  • Mycology
  • Mycorrhiza
  • Mycorrhizae
  • Mycosis
  • Mycotoxicosis
  • Myelin
  • Myocardial Infarction
  • Myocardium
  • Myofibril
  • Myofilament
  • Myopia
  • Myriapoda
  • Myxini
  • NAD
  • NADH
  • NADP
  • NADPH
  • NK
  • Nacre
  • Nasal Cavity
  • Natural Killer Cell
  • Natural Plant Reproduction
  • Natural Sciences
  • Natural Selection
  • Nature Preserve
  • Nauplius
  • Nectar
  • Nectar Guide
  • Negative Feedback Loop
  • Negative Frequency-dependent Selection
  • Negative Gravitropism
  • Negative Polarity
  • Negative Regulation
  • Negative Regulator
  • Nematocyst
  • Nematoda
  • Nematode
  • Nematode Excretory System
  • Nematode Morphology
  • Nematode Nervous System
  • Nematode Reproduction
  • Nemertea
  • Nemertea Digestive System
  • Nemertea Morphology
  • Nemertea Nervous System
  • Nemertea Reproduction
  • Neognathae
  • Neornith
  • Nephridia
  • Nephridiopore
  • Nephrologist
  • Nephrology
  • Nephron
  • Neritic Zone
  • Nerve Impulse Transmission
  • Nervous System
  • Nervous System Disorder
  • Nervous Tissue
  • Net Consumer Productivity
  • Net Primary Productivity
  • Net Production Efficiency
  • Network Model
  • Neural Response
  • Neural Stimuli
  • Neural Thermoregulation
  • Neural Tube
  • Neurobiology
  • Neurodegenerative Disorder
  • Neurogenesis
  • Neurological Disorder
  • Neurologist
  • Neuron
  • Neuron Communication
  • Neuron Parts
  • Neuron Structure
  • Neuron Type
  • Neurotransmitter
  • Neutral PH
  • Neutron
  • Neutrophil
  • Next-generation Sequencing
  • Niels Bohr
  • Nitrification
  • Nitrogen Cycle
  • Nitrogen Fixation
  • Nitrogenase
  • Nitrogenous Waste
  • Noble Gas
  • Nociception
  • Node
  • Nodes of Ranvier
  • Nodule
  • Non-competitive Inhibition
  • Non-electrolyte
  • Non-neutral PH
  • Non-renewable Resource
  • Non-sister Chromatid
  • Non-vascular Plant
  • Nondisjunction
  • Nonparental Type
  • Nonpolar Covalent Bond
  • Nonrandom Mating
  • Nonsense Codon
  • Nontemplate Strand
  • Norepinephrine
  • Northern Blotting
  • Notochord
  • Nuclear Division
  • Nuclear Envelope
  • Nucleic Acid
  • Nucleic Acids
  • Nucleoid
  • Nucleolus
  • Nucleoplasm
  • Nucleosome
  • Nucleotide
  • Nucleotide Excision Repair
  • Nucleus
  • Nucleus-first Hypothesis
  • Nutrient
  • Nutrient Deficiency
  • Nutrition
  • Nutritional Adaptation
  • Nutritional Requirements of Plants
  • O Horizon
  • Obesity
  • Obstructive Disease
  • Occipital Lobe
  • Ocean Upwelling
  • Oceanic Zone
  • Octamer Box
  • Octet Rule
  • Oderant
  • Odor
  • Odorant
  • Oil
  • Okazaki Fragment
  • Olfaction
  • Olfactory Bulb
  • Olfactory Epithelium
  • Oligodendrocyte
  • Oligosaccharin
  • Omega Fat
  • Omega-3
  • Omega-6
  • Omnivore
  • Oncogene
  • Oncogenic Virus
  • Oncolytic Virus
  • One-child Policy
  • Oogenesis
  • Oomycete
  • Open Circulatory System
  • Open System
  • Operant Conditioning
  • Operator
  • Operon
  • Opisthokonta
  • Opposition
  • Opsonization
  • Orbital
  • Order
  • Organ
  • Organ System
  • Organ of Corti
  • Organelle
  • Organic Compound
  • Organic Molecule
  • Organic Soil
  • Organism
  • Organism Diversity
  • Organismal Ecology
  • Organogenesis
  • Origin
  • Origin of Species
  • Ornithorhynchidae
  • Osculum
  • Osmoconformer
  • Osmolality
  • Osmolarity
  • Osmophile
  • Osmoreceptor
  • Osmoregulation
  • Osmoregulator
  • Osmoregulatory
  • Osmosis
  • Osmotic Balance
  • Osmotic Excretion
  • Osmotic Pressure
  • Osmotic Regulation
  • Osmotic System
  • Osseous Tissue
  • Ossicle
  • Ossification
  • Osteichthyes
  • Osteoblast
  • Osteoclast
  • Osteocyte
  • Osteon
  • Osteons
  • Ostia
  • Ostium
  • Ostracoderm
  • Outbreeding
  • Outer Ear
  • Outward Recoil
  • Oval Window
  • Ovarian Cycle
  • Over-harvesting
  • Overpopulation
  • Oviduct
  • Oviger
  • Oviparity
  • Ovoviparity
  • Ovulation
  • Ovule
  • Oxidative Phosphorylation
  • Oxygen
  • Oxygen Dissociation Curve
  • Oxygen-carrying Capacity
  • Oxytocin
  • P1
  • P21
  • P53
  • PAMP
  • PCR
  • PCT
  • PH Paper
  • PH Scale
  • PNS
  • PRL
  • PRR
  • PTH
  • Pacinian Corpuscle
  • Pain
  • Paleobotany
  • Paleognathae
  • Paleontologist
  • Paleontology
  • Paleozoic Period
  • Palmately Compound Leaf
  • Pan
  • Pancreas
  • Pancreatic Islets
  • Pandemic
  • Papilla
  • Parabasalid
  • Paracentric
  • Paracrine Signal
  • Parafollicular Cell
  • Paramecium
  • Paranthropus
  • Parasite
  • Parasitic Plant
  • Parasitism
  • Parasympathetic Nervous System
  • Parathyroid Gland
  • Parathyroid Hormone
  • Parazoa
  • Parenchyma Cell
  • Parent Material
  • Parental Care
  • Parental Generation
  • Parental Type
  • Parietal Lobe
  • Parkinson's Disease
  • Parthenogenesis
  • Partial Pressure
  • Particulate Matter
  • Passive Immunity
  • Passive Transport
  • Patella
  • Pathogen
  • Pathogen Recognition
  • Pathogen-associated Molecular Pattern
  • Pathogens
  • Pathologist
  • Pattern Recognition Receptor
  • Patterns of Biodiversity
  • Patterns of Evolution
  • Peas
  • Peat Moss
  • Pectoral Girdle
  • Pedigree Analysis
  • Pedipalp
  • Peer-reviewed
  • Pelagic Realm
  • Pellicle
  • Penis
  • Peppered Moth
  • Pepsin
  • Pepsinogen
  • Peptide Bond
  • Peptide Hormone
  • Peptidoglycan
  • Peptidyl Transferase
  • Perception
  • Perennial
  • Perforin
  • Perianth
  • Pericardium
  • Pericarp
  • Pericentric
  • Pericycle
  • Periderm
  • Periodic Table
  • Peripheral Nervous System
  • Peripheral Protein
  • Peripheral Resistance
  • Perirenal Fat Capsule
  • Peristalsis
  • Peristome
  • Peritubular Capillary Network
  • Permafrost
  • Permanent Tissue
  • Permissive
  • Peroxisome
  • Petal
  • Petiole
  • Petromyzontidae
  • Phage
  • Phage Therapy
  • Phagocytosis
  • Pharmaceutical Chemist
  • Pharmacogenomics
  • Pharyngeal Slits
  • Pharynx
  • Phenotype
  • Pheromone
  • Phloem
  • Phosphatase
  • Phosphate Group
  • Phosphodiester
  • Phosphodiesterase
  • Phosphofructokinase
  • Phospholipid
  • Phospholipid Bilayer
  • Phosphorus Cycle
  • Phosphorylation
  • Photic Zone
  • Photoautotroph
  • Photomorphogenesis
  • Photon
  • Photoperiodism
  • Photoreceptor
  • Photosynthate Transport
  • Photosynthesis
  • Photosynthesis Products
  • Photosynthesis Reactants
  • Photosystem I
  • Photosystem II
  • Phototroph
  • Phototropin
  • Phototropism
  • Phyla
  • Phyllotaxy
  • Phylogenetic Model
  • Phylogenetic Tree
  • Phylogeny
  • Phylum
  • Phylum Annelida
  • Phylum Arthropoda
  • Phylum Cnidaria
  • Phylum Echinodermata
  • Phylum Mollusca
  • Phylum Nematoda
  • Phylum Nemertea
  • Phylum Porifera
  • Physical Anthropologist
  • Physical Location
  • Physical Map
  • Physical Properties of Soil
  • Physical Science
  • Physiological Dead Space
  • Physiological Shunt
  • Physiology
  • Phytochrome
  • Pia Mater
  • Pigment
  • Pilidium
  • Pinna
  • Pinnately Compound Leaf
  • Pinocytosis
  • Pioneer Species
  • Pistil
  • Pith
  • Pituitary Dwarfism
  • Pituitary Gland
  • Pivot Joint
  • Placenta
  • Plagiarism
  • Plague of Athens
  • Planar Joint
  • Planaria
  • Planktivore
  • Plankton
  • Planospiral
  • Plant Adaptation
  • Plant Anatomy
  • Plant Animal Interaction
  • Plant Biodiversity
  • Plant Biology
  • Plant Body
  • Plant Cell
  • Plant Chemical Composition
  • Plant Death
  • Plant Defense
  • Plant Ecology
  • Plant Evolution
  • Plant Fertilization
  • Plant Form
  • Plant Hormones
  • Plant Life Span
  • Plant Life on Land
  • Plant Lifecycle
  • Plant Lifespan
  • Plant Nutrient
  • Plant Nutrition
  • Plant Organ System
  • Plant Organs
  • Plant Parasite
  • Plant Pathogen
  • Plant Phylogeny
  • Plant Physiology
  • Plant Reproduction
  • Plant Reproductive Development
  • Plant Reproductive Process
  • Plant Reproductive Structure
  • Plant Response
  • Plant Response to Touch
  • Plant Response to Wind
  • Plant Sensory System
  • Plant Sexual Reproduction
  • Plant Transport
  • Plantar Flexion
  • Plants
  • Planuliform
  • Plasma
  • Plasma Cell
  • Plasma Membrane
  • Plasma Membrane Hormone Receptor
  • Plasmid
  • Plasmodesma
  • Plasmodesmata
  • Plasmodium
  • Plasmogamy
  • Plastid
  • Platelet
  • Platyrrhini
  • Pleistocene Extinction
  • Plesiadapis
  • Pleura
  • Pleurisy
  • Ploidy Level
  • Plumule
  • Pneumatic Bone
  • Point Mutation
  • Polar Body
  • Polar Covalent Bond
  • Polar Nuclei
  • Polarity
  • Pollen
  • Pollen Evolution
  • Pollen Grain
  • Pollen Tube
  • Pollination
  • Pollination by Bats
  • Pollination by Birds
  • Pollination by Insects
  • Pollination by Water
  • Pollination by Wind
  • Poly-A Tail
  • Polyandry
  • Polycarpic
  • Polygenic
  • Polygenic Inheritance
  • Polygyny
  • Polymer
  • Polymerase Chain Reaction
  • Polymorphism
  • Polynucleotide
  • Polyp
  • Polypeptide
  • Polyploid
  • Polyploidy
  • Polysaccharide
  • Polysome
  • Polyspermy
  • Polytomy
  • Pond
  • Pongo
  • Population
  • Population Demography
  • Population Density
  • Population Distribution
  • Population Dynamics
  • Population Ecology
  • Population Evolution
  • Population Genetics
  • Population Model
  • Population Regulation
  • Population Research
  • Population Size
  • Population Variation
  • Porifera
  • Positive Feedback Loop
  • Positive Frequency-dependent Selection
  • Positive Gravitropism
  • Positive Polarity
  • Positive Regulator
  • Post-Cambrian
  • Post-anal Tail
  • Post-transcriptional
  • Post-transcriptional Gene Regulation
  • Post-translational
  • Post-translational Gene Regulation
  • Posterior Pituitary
  • Postzygotic Barrier
  • Potential Energy
  • Potocytosis
  • PrP
  • Pre-Cambrian
  • Precapillary Sphincter
  • Predation
  • Predator
  • Pregnancy
  • Preinitiation Complex
  • Presbyopia
  • Present Climate Change
  • Preservation
  • Preserve
  • Preserve Design
  • Prezygotic Barrier
  • Primary Active Transport
  • Primary Bronchus
  • Primary Consumer
  • Primary Electron Acceptor
  • Primary Feather
  • Primary Growth
  • Primary Producer
  • Primary Structure
  • Primary Succession
  • Primase
  • Primate
  • Primate Characteristic
  • Primate Evolution
  • Primer
  • Prion Protein
  • Prions
  • Probability
  • Probability Method
  • Probe
  • Product
  • Product Rule
  • Productive
  • Progesterone
  • Prognathic Jaw
  • Progymnosperm
  • Prokaryote
  • Prokaryote Cell Division
  • Prokaryote Energy
  • Prokaryote Evolution
  • Prokaryote HGT
  • Prokaryote Metabolism
  • Prokaryote Reproduction
  • Prokaryote-first Hypothesis
  • Prokaryotes
  • Prokaryotic Cell
  • Prokaryotic Cell Division
  • Prokaryotic DNA
  • Prokaryotic Diversity
  • Prokaryotic Gene Expression
  • Prokaryotic Gene Regulation
  • Prokaryotic Genome
  • Prokaryotic Metabolism
  • Prokaryotic Transcription
  • Prolactin
  • Prolactin-inhibiting Hormone
  • Prolactin-releasing Hormone
  • Prometaphase
  • Prometaphase I
  • Prometaphase II
  • Promoter
  • Pronation
  • Proofreading
  • Prophage
  • Prophase
  • Prophase I
  • Prophase II
  • Proprioception
  • Propriorception
  • Prosimian
  • Prostate Gland
  • Prosthetic
  • Protease
  • Proteasome
  • Protein
  • Protein Digestion
  • Protein Folding
  • Protein Function
  • Protein Metabolic Pathway
  • Protein Organization
  • Protein Shape
  • Protein Signature
  • Protein Synthesis
  • Protein Type
  • Proteins
  • Proteomics
  • Protist
  • Protist Cell Structure
  • Protist Diversity
  • Protist Ecology
  • Protist Group
  • Protist Habitat
  • Protist Life Cycle
  • Protist Metabolism
  • Protist Motility
  • Protist Supergroup
  • Protista
  • Protists
  • Protists Cell Structure
  • Protists Ecology
  • Protists Life Cycle
  • Protists Motility
  • Proto-Oncogene
  • Proton
  • Protonema
  • Protostome
  • Protraction
  • Proventriculus
  • Proximal Convoluted Tubule
  • Pseudo-ruminant
  • Pseudocoelomate
  • Pseudostratified
  • Psychrophile
  • Pterosaur
  • Pulmocutaneous Circulation
  • Pulmonary Circulation
  • Punctuated Equilibrium
  • Punnett Square
  • Pupil
  • Pure Culture
  • Purine
  • Pyramidine
  • Pyruvate
  • Pyruvate Kinase
  • Pyruvate Oxidation
  • Pyruvic Acid
  • Quadrat
  • Quaternary Structure
  • Quiescent
  • Quorum-sensing
  • R-selected Species
  • R.A. Fisher
  • RBP
  • RER
  • RNA
  • RNA Binding Protein
  • RNA Editing
  • RNA Processing
  • RT-PCR
  • Rachis
  • Radial Cleavage
  • Radial Glia
  • Radial Symmetry
  • Radiation Hybrid Mapping
  • Radicle
  • Radioactive Decay
  • Radioisotope
  • Radiolarian
  • Radioresistant
  • Radius
  • Radula
  • Randomness
  • Raphe
  • Rate of Diffusion
  • Rate of Speciation
  • Rates of Speciation
  • Ray-finned Fish
  • Rb
  • Reactant
  • Reaction Center
  • Reading Frame
  • Recepter-mediated Endocytosis
  • Reception
  • Receptive Field
  • Receptor
  • Receptor Potential
  • Receptor-mediated Endocytosis
  • Recessive
  • Recessive Allele
  • Recessive Gene
  • Recessive Lethal
  • Reciprocal Cross
  • Recombinant DNA
  • Recombinant Protein
  • Recombinant Type
  • Recombination
  • Recombination Frequency
  • Recombination Nodule
  • Reconnection
  • Recruitment
  • Rectum
  • Recycler
  • Red Algae
  • Red Blood Cell
  • Red Light
  • Red Queen Hypothesis
  • Red/far-red Response
  • Redox Reaction
  • Reduction
  • Reduction Division
  • Reflex Action
  • Refractory Period
  • Regeneration
  • Regulation
  • Regulation of Gene Expression
  • Regulatory Protein
  • Regulatory T Cell
  • Relative Fitness
  • Relative Species Abundance
  • Renal
  • Renal Artery
  • Renal Capsule
  • Renal Column
  • Renal Corpuscle
  • Renal Fascia
  • Renal Pelvis
  • Renal Pyramid
  • Renal Tubule
  • Renal Vein
  • Renin
  • Renin-angiotensin
  • Renin-angiotensin-aldosterone
  • Replication Fork
  • Replicative Intermediates
  • Repressor
  • Reproduction
  • Reproductive Anatomy
  • Reproductive Barrier
  • Reproductive Cloning
  • Reproductive Endocrinologist
  • Reproductive Hormones
  • Reproductive Isolation
  • Reproductive System Regulation
  • Reptile
  • Reptile Characteristics
  • Residence Time
  • Residual Volume
  • Resistance
  • Resorption
  • Respiratory Bronchiole
  • Respiratory Distress Syndrome
  • Respiratory Quotient
  • Respiratory Rate
  • Respiratory System
  • Respiratory Therapist
  • Resting Membrane Potential
  • Restriction Endonuclease
  • Restriction Fragment Length Polymorphism
  • Restrictive Disease
  • Results
  • Resuscitation
  • Retina
  • Retinal Processing
  • Retinoblastoma Protein
  • Retraction
  • Reverse Genetics
  • Reverse Transcriptase
  • Reverse Transcriptase PCR
  • Reversible Chemical Reaction
  • Review Article
  • Rheumatologist
  • Rhizaria
  • Rhizobia
  • Rhizoid
  • Rhizome
  • Rhizosphere
  • Rho-dependent Termination
  • Rho-independent Termination
  • Rhodophyte
  • Rhodopsin
  • Rhynchocoel
  • Rib
  • Ribcage
  • Ribonuclease
  • Ribonucleic Acid
  • Ribosomal RNA
  • Ribosome
  • Ring Model
  • Ring of Life
  • River
  • Robert Boyle
  • Robert Hooke
  • Rod
  • Root
  • Root Anatomy
  • Root Bacteria Interaction
  • Root Cap
  • Root Growth
  • Root Hair
  • Root Modification
  • Root Pressure
  • Root Structure
  • Root System
  • Root Zone
  • Rooted
  • Roots
  • Rotational Movement
  • Rough Endoplasmic Reticulum
  • Roughage
  • Rrna
  • RuBP
  • RuBisCO
  • Ruffini Ending
  • Ruminant
  • Runner
  • S Phase
  • S-layer
  • S-shaped Growth Curve
  • S. J. Singer
  • SER
  • SMR
  • STEM
  • Sac Fungi
  • Saddle Joint
  • Sagittal Plane
  • Salamander
  • Salivary Amylase
  • Saltatory Conduction
  • Salty
  • Sand
  • Sanger Method
  • Saprobe
  • Saprophytes
  • Sarcolemma
  • Sarcomere
  • Sarcopterygii
  • Sargassum
  • Satellite Glia
  • Saturated Fat
  • Saturated Fatty Acid
  • Sauropsid
  • Scapula
  • Scarification
  • Schizocoelous Coelom
  • Schizocoely
  • Schizophrenia
  • Schwann Cell
  • Science
  • Scientific Method
  • Scientific Reasoning
  • Sclerenchyma Cell
  • Sclerocyte
  • Scrotum
  • Scutellum
  • Scyphozoa
  • Sebaceous Gland
  • Second Filial Generation
  • Second Gap
  • Second Law of Thermodynamics
  • Second Messenger
  • Secondary Active Transport
  • Secondary Consumer
  • Secondary Endocrine Function
  • Secondary Endosymbiosis
  • Secondary Feather
  • Secondary Growth
  • Secondary Plant Compounds
  • Secondary Sexual Characteristic
  • Secondary Structure
  • Secondary Succession
  • Secretin
  • Seed
  • Seed Development
  • Seed Dispersal
  • Seed Evolution
  • Seed Germination
  • Seed Plant
  • Seed Plant Evolution
  • Seed Plant Reproduction
  • Seed Plants
  • Seedless Non-vascular Plant
  • Seedless Non-vascular Plants
  • Seedless Plant
  • Seedless Plants
  • Seedless Tracheophyte
  • Seedless Vascular Plant
  • Segmental Artery
  • Segregation of Alleles
  • Selective Permeability
  • Selective Pressure
  • Selectively Permeable
  • Self-pollination
  • Semelparity
  • Semen
  • Semi-permeable Membrane
  • Semicircular Canal
  • Semilunar Valve
  • Seminal Vesicle
  • Seminiferous Tubule
  • Senescence
  • Sense
  • Sensory Perception
  • Sensory Process
  • Sensory Receptor
  • Sensory System
  • Sensory Transduction
  • Sensory-somatic Nervous System
  • Sepal
  • Septum
  • Sequence Mapping
  • Serendipity
  • Sertoli Cell
  • Serum
  • Sessile
  • Set Point
  • Seta
  • Seta/chaeta
  • Sex Chromosome
  • Sex Chromosomes
  • Sex Determination
  • Sex Linkage
  • Sex-linked Disorder
  • Sex-linked Genes
  • Sex-linked Trait
  • Sex-role Reversed
  • Sexual Development
  • Sexual Dimorphism
  • Sexual Dimorphisms
  • Sexual Lifecycle
  • Sexual Reproduction
  • Sexual Response
  • Sexual Selection
  • Shared Ancestral Character
  • Shared Characteristic
  • Shared Derived Character
  • Shinbone
  • Shine-Dalgarno Sequence
  • Shoot System
  • Short Bone
  • Short-term Stress Response
  • Shotgun Sequencing
  • Sickle-cell Anemia
  • Sieve-tube Cell
  • Sight
  • Signal
  • Signal Cascade
  • Signal Integration
  • Signal Propagation
  • Signal Response
  • Signal Sequence
  • Signal Summation
  • Signal Transduction
  • Signal Transduction Pathway
  • Signal Transmission
  • Signaling Cell
  • Signaling Molecule
  • Signaling Pathway
  • Silent Mutation
  • Silt
  • Simple Epithelia
  • Simple Fruit
  • Simple Leaf
  • Simple Plant Tissue
  • Simulation Model
  • Single Nuclear Division
  • Single Nucleotide Polymorphism
  • Single-cell Organism
  • Single-celled Yeast
  • Single-strand Binding Protein
  • Sink
  • Sinoatrial (SA) Node
  • Sister Chromatid
  • Sister Taxa
  • Skeletal Movement
  • Skeletal Muscle
  • Skeletal Muscle Tissue
  • Skeletal System
  • Skeleton Evolution
  • Skin Sensor
  • Skull
  • Sliding Clamp
  • Sliding Filament Model of Contraction
  • Slime Mold
  • Small 40S Ribosomal Subunit
  • Small Intestine
  • Small Nuclear RNA
  • Smell
  • Smooth Endoplasmic Reticulum
  • Smooth Muscle
  • Smooth Muscle Tissue
  • Sociobiology
  • Sodium-potassium Pump
  • Soil
  • Soil Biology
  • Soil Climate
  • Soil Composition
  • Soil Formation
  • Soil Horizon
  • Soil Profile
  • Soil Properties
  • Solar Dependence
  • Solar Intensity
  • Solid
  • Solubility
  • Solute
  • Solute Transport
  • Solvent
  • Solvent Density
  • Somatic Cell
  • Somatosensation
  • Somatosensory Receptor
  • Somatostatin
  • Somite
  • Soredia
  • Sound
  • Sound Reception
  • Sound Transduction
  • Sour
  • Source
  • Source Water
  • Southern Blotting
  • Speciation
  • Species
  • Species Distribution
  • Species Distribution Pattern
  • Species Diversity
  • Species Richness
  • Species-area Relationship
  • Specific Heat Capacity
  • Spermatheca
  • Spermatogenesis
  • Spermatophyte
  • Sphenodontia
  • Sphere of Hydration
  • Sphincters
  • Spice
  • Spinal Cord
  • Spinal Nerve
  • Spindle Checkpoint
  • Spine
  • Spiral Cleavage
  • Spirometry
  • Splicing
  • Sponge
  • Sponge Locomotion
  • Sponge Metabolism
  • Sponge Morphology
  • Sponge Reproduction
  • Spongocoel
  • Spongy Bone Tissue
  • Spontaneous Mutation
  • Spontaneous Reaction
  • Sporangia
  • Sporangium
  • Spore
  • Sporocyte
  • Sporophyll
  • Sporophyte
  • Sporopollenin
  • Spring Turnover
  • Squamata
  • Squamous Epithelia
  • Stabilizing Selection
  • Stahl
  • Stamen
  • Standard Metabolic Rate
  • Stapes
  • Start Codon
  • Statolith
  • Stele
  • Stem Anatomy
  • Stem Growth
  • Stem Modifications
  • Stentor
  • Stereocilia
  • Stereoscopic Vision
  • Sternum
  • Steroid
  • Stigma
  • Stipule
  • Stirrup
  • Stolon
  • Stomach
  • Stomata
  • Stomatal Regulation
  • Stramenopile
  • Stratified Epithelia
  • Stream
  • Streptophyte
  • Strigolactone
  • Strobili
  • Strobilus
  • Stroke
  • Stroma
  • Stromatolite
  • Structural Isomers
  • Study of Life
  • Style
  • Subduction
  • Subshell
  • Substituted Hydrocarbon
  • Substrate
  • Substrate Phosphorylation
  • Substrate Specificity
  • Subtropical Desert
  • Succinyl CoA
  • Sucrase
  • Sugar Metabolism
  • Sulci
  • Sulcus
  • Sulfur Cycle
  • Sum Rule
  • Summation
  • Superbug
  • Superior Colliculus
  • Superior Vena Cava
  • Superphylum Lophotrochozoa
  • Supination
  • Suprachiasmatic Nucleus
  • Surface Tension
  • Surfactant
  • Survivorship Curve
  • Suspensor
  • Sutton's Theory of Inheritance
  • Suture
  • Sweet
  • Swim Bladder
  • Symbiont
  • Symbiosis
  • Symbiotic Relationship
  • Sympathetic Nervous System
  • Sympatric Speciation
  • Symphyses
  • Symporter
  • Synapse
  • Synapsid
  • Synapsis
  • Synaptic Cleft
  • Synaptic Plasticity
  • Synaptic Signal
  • Synaptic Transmission
  • Synaptic Vesicle
  • Synaptonemal Complex
  • Synarthrosis
  • Synchondrosis
  • Syndesmoses
  • Synergid
  • Synovial Joint
  • Synthesis of Biological Macromolecules
  • Systematics
  • Systemic Circulation
  • Systems Biology
  • Systole
  • T-cell
  • TATA Box
  • TCA Cycle
  • TFIIB
  • TFIID
  • TFIIE
  • TFIIF
  • TFIIH
  • Tachyglossidae
  • Tactile Corpuscle
  • Tadpole
  • Tap Root
  • Target Cell
  • Tarsal
  • Tastant
  • Taste
  • Taste Bud
  • Taxa
  • Taxis
  • Taxon
  • Taxonomy
  • Tectorial Membrane
  • Tegmen
  • Teichoic Acid
  • Telomerase
  • Telomere
  • Telomere Replication
  • Telophase
  • Telophase I
  • Temperate Forest
  • Temperate Grassland
  • Temperature
  • Temperature-dependent Sex Determination (TSD)
  • Template Strand
  • Temporal Fenestrae
  • Temporal Isolation
  • Temporal Lobe
  • Tendril
  • Terminal Bronchiole
  • Terrestrial Biome
  • Terrestrial Ecosystem
  • Terrestrial Environment
  • Terrestrial Influence
  • Tertiary Consumer
  • Tertiary Structure
  • Test Cross
  • Testa
  • Testis
  • Testosterone
  • Testudines
  • Tetrahedral Geometry
  • Tetrahedron
  • Tetrapod
  • Thalamus
  • Thalassemia
  • Thallus
  • The Periodic Table
  • Theodor Schwann
  • Theory
  • Therapod
  • Thermocline
  • Thermodynamics
  • Thermophile
  • Thermoreception
  • Thermoregulation
  • Thichromatic Coding
  • Thick Filament
  • Thighbone
  • Thigmomorphogenesis
  • Thigmonastic
  • Thigmotropism
  • Thin Filament
  • Thomas Hunt Morgan
  • Thoracic Cage
  • Thoracic Cavity
  • Thorn
  • Threats to Biodiversity
  • Three-point Test Cross
  • Threshold of Excitation
  • Thrichomatic Coding
  • Thryoxine
  • Thylakoid
  • Thymus
  • Thyroglobulin
  • Thyroid
  • Thyroid Gland
  • Thyroid Regulation
  • Thyroid-stimulating Hormone
  • Thyroxine
  • Ti Plasmid
  • Tibia
  • Tidal Volume
  • Tight Junction
  • Tissue
  • Tissue Structure
  • Tonic Activity
  • Tonicity
  • Topography
  • Topoisomerase
  • Torpor
  • Total Lung Capacity
  • Toxicogenomics
  • Trabecula
  • Trachea
  • Tracheal System
  • Tracheid
  • Tracheophyte
  • Tragedy of the Commons
  • Trait
  • Trait-blending Hypothesis
  • Trans Fat
  • Trans-acting Element
  • Transcription
  • Transcription Bubble
  • Transcription Factor
  • Transcription Factor Binding Site
  • Transcription Gene Regulation
  • Transcriptional Gene Regulation
  • Transcriptional Start Site
  • Transduction
  • Transfer Cell
  • Transfer RNA
  • Transformation
  • Transgenic
  • Transition State
  • Transition Substitution
  • Transitional Epithelia
  • Translation
  • Translational Gene Regulation
  • Translocation
  • Transpiration
  • Transpiration Regulation
  • Transport Maximum
  • Transport Protein
  • Transverse Plane
  • Transversion Substitution
  • Tree of Life
  • Triacylglycerol
  • Trichome
  • Tricuspid Valve
  • Triglyceride
  • Triiodothyronine
  • Trimester
  • Triplobast
  • Trisomy
  • Trna
  • Trocophore
  • Trophic Diversity
  • Trophic Level
  • Trophic Level Energy
  • Trophic Level Transfer Efficiency
  • Trophoblast
  • Tropical Wet Forest
  • Tropomyosin
  • Troponin
  • Trp Operon
  • Trypanosome
  • Trypsin
  • Tryptophan
  • Tuber
  • Tubular Reabsorption
  • Tubular Secretion
  • Tumor Suppressor
  • Tumor Suppressor Gene
  • Tunicate
  • Turgor Pressure
  • Tympanic Membrane
  • Tympanum
  • Types of Ecosystems
  • Ubiquinone
  • Ulna
  • Ultrasound
  • Umami
  • Unculturable Prokaryote
  • Unfavorable Allele
  • Unicellular
  • Unidirectional Circulation
  • Unified Cell Theory
  • Uniporter
  • Uniramous Appendage
  • Unit Factor
  • Unsaturated Fat
  • Unsaturated Fatty Acid
  • Untranslated Region
  • Up-regulation
  • Upstream
  • Urea Cycle
  • Ureotelic
  • Ureter
  • Uric Acid
  • Urinary Bladder
  • Urine
  • Urine Formation
  • Urochordata
  • Urodela
  • Uroepithelial
  • Uterus
  • VBNC State
  • Vaccination
  • Vaccine
  • Vacuole
  • Vagina
  • Valence Shell
  • Van Der Waals Interaction
  • Variable
  • Variable Number of Tandem Repeats
  • Variation
  • Vasa Recta
  • Vascular Bundle
  • Vascular Plant
  • Vascular Tissue
  • Vasoconstriction
  • Vasodilation
  • Vasodilator
  • Vasopressin
  • Vein
  • Veliger
  • Vena Cava
  • Venation
  • Venous P_(CO_2 )
  • Venous P_(O_2 )
  • Ventilation/perfusion
  • Ventral Cavity
  • Ventricaria Ventricosa
  • Ventricle
  • Venule
  • Vernalization
  • Vertebral Column
  • Vertebrata
  • Vertebrate
  • Vertebrate Evolution
  • Vertebrate Formation
  • Vertebrates
  • Vertical Transmission
  • Vesicle
  • Vessel Element
  • Vestibular Information
  • Vestibular Sensation
  • Vestibular Sense
  • Vestigial Structure
  • Veterinarian
  • Viable-but-non-culturable State
  • Vicariance
  • Villi
  • Viral Assembly
  • Viral Capsids
  • Viral Morphology
  • Viral Receptors
  • Viral Replication
  • Virion
  • Viroids
  • Virologist
  • Virology
  • Virus
  • Virus Attachment
  • Virus Core
  • Virus Detection
  • Virus Discovery
  • Virus Entry
  • Virus Evolution
  • Virus Infection
  • Visceral Pleura
  • Visible Light
  • Vision
  • Vital Capacity
  • Vitamin
  • Viviparity
  • W. Ford Doolittle
  • WNS
  • Walter Sutton
  • Waste Excretion
  • Water
  • Water Cycle
  • Water Mold
  • Water Pollination
  • Water Potential
  • Water Transport
  • Wavelength
  • Wax
  • Weather
  • Web Model
  • Web of Life
  • Wetland
  • Whisk Fern
  • White Blood Cell
  • White-nose Syndrome
  • Whole Genome Sequencing
  • Whorled
  • Wild Food Sources
  • Wild Type
  • Wildlife Preserve
  • Wilkins and Holliday
  • Wind Pollination
  • Wood Products
  • X Linkage
  • X-Inactivation
  • X-linked Disorders
  • X-linked Genes
  • X-linked Trait
  • Xylem
  • Yeast
  • Zero Population Growth
  • Zoea
  • Zona Pellucida
  • Zoo
  • Zoology
  • Zoonosis
  • Zygomycete
  • Zygomycota
  • Zygospore
  • Zygote
    License:
    Creative Commons Attribution
    Language:
    English

    Education Standards

    Biology 2e

    Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

    Unit 3
    The Cell
    Unit 4
    Genetics
    Unit 6
    Biological Diversity
    Unit 7
    Plant Structure and Function
    Unit 8
    Animal Structure and Function
    Unit 9
    Ecology