Sessile form of cnidarian is called a:
What do sponges (porifera) have to suggest they are true multicellular organisms?
presence of specialized cells and tissues.
Endoderm forms in what embryonic stage?
If you're an animal with a tube-within-a-tube body plan, what do you have more than primitive animals?
Earthworms are able to move through soil by:
If you see 'neph' in a work (netanephrida), you knkow it has to do with:
In crinoids, tube feet are used for:
Which are most related to humans?
seastars (because they are deuteristic)
Which is NOT a characteristic about early chordates?