A sea star feeds by absorbing food through the
A) tube feet on the tentacles.
B) dermal calcareous ossicles.
C) stone and ring canals.
D) lower part of stomach which is everted.
E) sieve plate.
Correct Answer:
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Q17: Water enters the water vascular system of
Q18: Which of the following are considered "irregular"
Q19: The function of the papulae in the
Q20: Ecologically,sea stars are at what trophic level?
A)Producer
B)Herbivore
C)Top
Q21: The complex chewing apparatus found in many
Q23: Brittle stars differ from sea stars by
A)lacking
Q24: The crinoids
A)have the most primitive characters.
B)have far
Q25: In echinoderms,the main coelomic compartment is
A)missing.
B)a somatocoel.
C)completely
Q26: Structures in each arm of a sea
Q27: How much nervous system does an echinoderm
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