Nematocysts are found only in
A) cnidarians.
B) nematodes.
C) crustaceans.
D) echinoderms.
E) sponges.
Correct Answer:
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Q4: Animals that are hermaphroditic usually
A) fertilize their
Q44: Which of the following phyla is characterized
Q45: Bilateral symmetry is characteristic of
A)cnidarians.
B)sponges.
C)jellyfish.
D)flatworms.
E)corals.
Q46: Fossil evidence of animal life dates back
Q47: An organism that possesses a scolex and
Q48: A planula is a
A)sedentary, attached, tree-shaped form
Q51: Which body plan is characterized by simple
Q52: The bulk of a jellyfish consists of
A)mesoderm.
B)mesohyl.
C)mesophyll.
D)mesoglea.
E)mesogel.
Q53: Tissues derived from mesoderm are absent in
A)sponges.
B)cnidarians.
C)flatworms.
D)sponges
Q54: In the life cycle of the fluke
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