What causes schistosomiasis, a devastating disease that affects about 200 million people in tropical regions?
A) Trichinella
B) Echinoderms
C) Parasitic flatworms called blood flukes
D) Amoebas
E) Nematodes
Correct Answer:
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Q23: The currents of water (containing food) that
Q24: Insects are members of the group
A) Echinodermata.
B)
Q25: Which of these groups is characterized by
Q26: Hydra, anemones, and jellyfish are in the
Q27: Which of these groups is characterized by
Q29: Sponges have
A) an exoskeleton.
B) a gastrovascular cavity.
C)
Q30: Which invertebrate animal group is characterized by
Q31: Ecdysozoans
A) have a body cavity that forms
Q32: A cnidarian that builds a calcium carbonate
Q33: Which cnidarian is the basis of many
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