Exam 30: An Introduction to Animal Diversity

Your abdominal cavity, which contains most of your major organs, is a:

The cephalic end of an animal is toward its head . ____________________

What is the key characteristic that defines the Ecdysozoa clade?

The diverse body plans seen in Animalia apparently developed during the:

Animals share a common origin with choanoflagellates . ____________________

Plankton consists mainly of microscopic organisms that float in the water. ____________________