Zooxanthellae are
A) algae that provide oxygen and nutrients for coral, and receive CO2 and a habitat from the coral.
B) a type of coral that exists mostly in the Pacific Ocean.
C) any organism that lives in the hadal zone.
D) any animal that lives in a lentic system for part of its life and on land in another part of its life.
A) algae that provide oxygen and nutrients for coral, and receive CO2 and a habitat from the coral.
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