In echinoderms,the main coelomic compartment is
A) missing.
B) a somatocoel.
C) completely converted into the water-vascular system.
D) the pyloric stomach.
E) restricted to a small space around the gonads.
Correct Answer:
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Q20: Ecologically,sea stars are at what trophic level?
A)Producer
B)Herbivore
C)Top
Q21: The complex chewing apparatus found in many
Q22: A sea star feeds by absorbing food
Q23: Brittle stars differ from sea stars by
A)lacking
Q24: The crinoids
A)have the most primitive characters.
B)have far
Q26: Structures in each arm of a sea
Q27: How much nervous system does an echinoderm
Q28: "Bipinnaria" describes the
A)larval form of many echinoderms.
B)central
Q29: If the radial nerve in an arm
Q30: The oral tentacles of the sea cucumber
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