Flatworms lack:
A) a respiratory system.
B) a reproductive system.
C) a nervous system.
D) a digestive cavity.
E) the ability to move.
Correct Answer:
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Q28: Hydrae, anemones, and jellyfish are in the
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.
Q34: Ecdysozoans:
A)have trochophore larva.
B)include mollusks, annelids, and flatworms.
C)have
Q35: A(n)_ provides support and protection to arthropods.
A)cytoskeleton
B)exoskeleton
C)hydrostatic
Q36: Which of these groups is characterized by
Q37: Which of these groups is characterized by
Q38: _ are characterized by having a pseudocoelom.
A)Roundworms
B)Annelids
C)Arthropods
D)Chordates
E)Cnidarians
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