Which of these groups is characterized by having no body cavity?
A) Cnidarians
B) Arthropods
C) Roundworms
D) Chordates
E) Annelids
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Q20: Which of the following characteristics is associated
Q21: The simplest multicellular animals that have only
Q22: Giant squids are classified as
A) echinoderms.
B) chordates.
C)
Q23: The currents of water (containing food) that
Q24: Insects are members of the group
A) Echinodermata.
B)
Q26: Hydra, anemones, and jellyfish are in the
Q27: Which of these groups is characterized by
Q28: What causes schistosomiasis, a devastating disease that
Q29: Sponges have
A) an exoskeleton.
B) a gastrovascular cavity.
C)
Q30: Which invertebrate animal group is characterized by
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