An organism that possesses a scolex and proglottids lacks
A) bilateral symmetry.
B) a coelom.
C) mesodermal tissue.
D) bilateral symmetry and a coelom.
E) bilateral symmetry, a coelom, and mesodermal tissue.
Correct Answer:
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Q4: Animals that are hermaphroditic usually
A) fertilize their
Q42: "Nerve net" describes the nervous system of
A)flatworms.
B)cnidarians.
C)annelids.
D)sponges.
E)none
Q43: Mesoglea is found in which of the
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
Q48: A planula is a
A)sedentary, attached, tree-shaped form
Q49: Nematocysts are found only in
A)cnidarians.
B)nematodes.
C)crustaceans.
D)echinoderms.
E)sponges.
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.
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