Superphylum Deuterostomia

Review Questions

Echinoderms have _____.

  1. triangular symmetry
  2. radial symmetry
  3. hexagonal symmetry
  4. pentaradial symmetry

Hint:

D

The circulatory fluid in echinoderms is _____.

  1. blood
  2. mesohyl
  3. water
  4. saline

Hint:

C

Which of the following features does not distinguish humans as a member of phylum Chordata?

  1. Human embryos undergo indeterminate cleavage.
  2. A spinal cord runs along an adult human’s dorsal side.
  3. Human embryos exhibit pharyngeal arches and gill slits.
  4. The human coccyx forms from an embryonic tail.

Hint:

A

The sister taxon of the Chordata is the _____.

  1. Mollusca
  2. Arthropoda
  3. Ambulacraria
  4. Rotifera

Hint:

C