Choose any 4 of the following animal groups and explain how they
are related, what characteristics they have in common, and what
characteristics differentiate them. You may find it helpful to draw
a cladogram to help illustrate your answer. Also consider using the
terms synapomorphy, homology and homoplasy. Groups to choose from:
Echinodermata, Hemichordata, Chordata, Vertebrata, Myxini,
Agnathan, Gnathostome, Chondrichthyes, Sarcopterygii, Amphibia,
Anura, Urodela (Caudata), Gymnophiona, Monotremata, Eutheria,
Chiroptera, Aves, Saurischia, Neognathae, Reptiles, Sphenodontia,
Testudines.