What is the relationship between coral and zooxanthellae?

a. Commensal; zooxanthellae are a type of algae that resides among the coral, but the coral is unaffected by its presence.
b. Mutually symbiotic; zooxanthellae provide the coral with nutrition, while the coral provides zooxanthellae with carbon dioxide.
c. Parasitic; zooxanthellae are a type of algae that grows inside coral, feeding off of the coral's nutrients and causing coral bleaching over time.
d. There is no relationship between the two. Zooxanthellae are terrestrials animal, and coral is aquatic.
e. Competitive; zooxanthellae are a type of algae that compete with coral for space and nutrients.


Ans: b. Mutually symbiotic; zooxanthellae provide the coral with nutrition, while the coral provides zooxanthellae with carbon dioxide.

Biology & Microbiology

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