A hemocoel or blood cavity is found in or associated with
A) sponges.
B) cephalopods.
C) acoelomates.
D) all animals.
E) an open circulatory system.
Correct Answer:
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Q43: Adult echinoderms that have radial symmetry lack
A)
Q44: Oysters are classified in the phylum
A) Echinodermata.
B)
Q45: Within the mollusks, only the cephalopods have
Q46: The tube feet of echinoderms that are
Q47: The venomous sea wasp is classified in
Q49: A sea urchin is a member of
Q50: A snail is a(n)
A) arthropod.
B) echinoderm.
C) chordate.
D)
Q51: The low energy demands of nematodes allow
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Q53: The animals most like the ancestral protist
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