The animals most like the ancestral protist colonies that likely gave rise to all animals are
A) echinoderms.
B) arthropods.
C) chordates.
D) sponges.
E) nematodes.
Correct Answer:
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Q48: A hemocoel or blood cavity is found
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
Q52: What distinguishes a free-living flatworm from other
Q54: Spiders belong to the
A) cnidarians.
B) echinoderms.
C) mollusks.
D)
Q55: Which of the following animals uses a
Q56: A clam is a(n)
A) echinoderm.
B) mollusk.
C) chordate.
D)
Q57: Which of the following animals are arachnids?
A)
Q58: The taxonomic group that contains the most
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