Worms with a well- developed circulatory system (including five pairs of hearts) are
A) annelids.
B) eels.
C) nematodes.
D) platyhelminths.
E) echinoderms.
Correct Answer:
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Q16: In the animal kingdom, cephalization is
A) development
Q17: Which germ layer gives rise to the
Q18: Anemones have no
A) mesoderm.
B) ectoderm.
C) endoderm.
Q19: Damage to the embryonic ectoderm would show
Q20: The skin and nervous tissues develop from
Q22: Insects are members of the group
A) Arachnida.
B)
Q23: Which of these groups is characterized by
Q24: The currents of water (containing food) that
Q25: Which cnidarian is the basis of many
Q26: A cnidarian that builds a calcium carbonate
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