How does the symbiotic relationship with a photosynthetic organism enable hard corals to produce their exoskeleton?

The corals and algae have a mutualistic relationship. The coral provides the algae with a protected environment and compounds they need for photosynthesis. In return, the algae produce oxygen and help the coral to remove wastes.

Explanation:

I dunno if this is right I may be a little off :}

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

b. to discover aspects of the natural world.

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