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Biology 19 Online
OpenStudy (anonymous):

Certain corals have been found in extremely deep water. These coral lack the zooxanthellae that are found in tropical coral reefs. What is the most likely explanation for this? a. Zooxanthellae cannot survive in cold water. b. Zooxanthellae cannot survive without sunlight. c. Zooxanthellae cannot survive without the coral polyps. d. Zooxanthellae cannot survive the high pressure of the deep ocean.

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