This document discusses the distinguishing characteristics of different groups of invertebrate animals. It lists and provides examples of 7 major groups of invertebrates: arthropods, mollusks, echinoderms, poriferans, cnidarians, platyhelminthes, and nematodes. The document also provides directions for students to identify characteristics of different invertebrate groups, give examples of animals from certain groups, and choose the best answers to questions about invertebrate taxonomy and care.