Define "catch connective tissue". Using specific examples from three of the five major living groups of echinoderms, describe three different ways in which catch connective tissue facilitates food capture.

Describe the differences in the coelomic systems between Oligochaetes and Polychaetes. How do the differences in the coeloms relate to differences in locomotion? Which characteristics unify the lophophorates? Describe each characteristic and how it differs between the lophophorate phyla.

Mention three similarities between lancelet and ammocoetes?

Define adaptation. How could you use a comparative approach to test whether mesoglea within a scyphozoan medusa was an adaptation for buoyancy? How could you use a different criterion to test whether the eyes of cubozoans were adaptive? Where would a comparative approach prove a better way to assess the adaptive values of a tegument in internal parasites: in tapeworms or nematodes? Why?