The crown-of-thorns sea star, Acanthaster planci, preys on the flesh of live coral. If coral animals are attacked by these sea stars, then what actually provides nutrition to the sea star, and which chemical (besides the toxin within their nematocysts) do the corals rely on for protection?
A) medusae; silica
B) exoskeleton; calcium carbonate
C) polyps; calcium carbonate
D) polyps; silica
Correct Answer:
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Q12: What would be the best anatomical feature
Q13: Use the following information to answer the
Q14: In terms of food capture, which sponge
Q15: The sharp, inch-long thorns of the crown-of-thorns
Q16: Use the following information to answer the
Q18: One should expect to find cilia associated
Q19: Use the following information to answer the
Q20: Sponges _.
A) have larvae that are motile
Q21: While sampling marine plankton in a lab,
Q22: Parasitism is one of the most widespread
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