A planula is a
A) sedentary, attached, tree-shaped form found in corals.
B) swimming larval form with an outer ciliated epidermis.
C) kind of parasitic worm.
D) fleshy lobe that extends laterally from the body wall of a marine worm.
E) rasplike tongue.
Correct Answer:
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Q4: Animals that are hermaphroditic usually
A) fertilize their
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
Q47: An organism that possesses a scolex and
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.
Q53: Tissues derived from mesoderm are absent in
A)sponges.
B)cnidarians.
C)flatworms.
D)sponges
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