Superphylum Lophotrochozoa: Molluscs and Annelids

Review Questions

Annelids have (a):

  1. pseudocoelom.
  2. true coelom.
  3. no coelom.
  4. none of the above

Hint:

B

A mantle and mantle cavity are present in:

  1. phylum Echinodermata.
  2. phylum Adversoidea.
  3. phylum Mollusca.
  4. phylum Nemertea.

Hint:

C

How does segmentation enhance annelid locomotion?

  1. Segmentation creates repeating body structures so the entire organism functions in synchrony.
  2. Segmentation allows specialization of different body regions.
  3. Neural segmentation allows annelids to localize sensations.
  4. Muscle contractions can be localized to specific regions of the body to coordinate movement.

Hint:

D