Hydrae, anemones, and jellyfish are in the phylum:
A) Porifera.
B) Cnidaria.
C) Platyhelminthes.
D) Protista.
E) Flagellates.
Correct Answer:
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Q23: Which cnidarian is the basis of an
Q24: The simplest multicellular animals that have only
Q25: Insects are:
A)annelids.
B)arthropods.
C)mollusks.
D)beetles.
E)arachnids.
Q26: Which of these groups is characterized by
Q27: Which invertebrate animal group is characterized by
Q29: An animal like a grasshopper can conserve
Q30: The currents of water (containing food)that pass
Q31: Worms with a well-developed circulatory system (including
Q32: Sponges have:
A)a gastrovascular cavity.
B)spicules.
C)a nerve net.
D)muscles.
E)an exoskeleton.
Q33: Flatworms lack:
A)a respiratory system.
B)a reproductive system.
C)a nervous
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