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The Hirudinida are unique in that they have both an anterior and a posterior ___________.
Q9: _ cells surround the intestine in the
Q9: Crustaceans have better-developed sense organs than do
Q19: The Sipunculans live in burrows and feed
Q21: Out of all metazoans,members of _ have
Q24: The stages in the life cycle of
Q29: Which is NOT a trait of sponges?<br>A)
Q44: Explain the concept of monophyly as it
Q45: The early embryology of hemichordates is much
Q49: In glass sponges,archaeocytes fuse their pseudopodia to
Q64: Compare the swimming mechanisms of invertebrates such