Ecdysozoans:
A) have trochophore larva.
B) include mollusks, annelids, and flatworms.
C) have a special feeding structure.
D) have a body cavity that forms from the digestive system.
E) periodically shed their outer body covering.
Correct Answer:
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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
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
Q39: The phylum Nematoda includes which of the
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