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katrin [286]
3 years ago
14

What are the basic structural units that form the tropical coral reefs?

Biology
1 answer:
Anna11 [10]3 years ago
4 0

Answer:

coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups.

Explanation:

that is all I can say.

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Explanation:

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