What are coral reefs? 4 class
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Coral reefs are large underwater structures composed of the skeletons of colonial marine invertebrates called coral. ... Each individual coral is referred to as a polyp. Coral polyps live on the calcium carbonate exoskeletons of their ancestors, adding their own exoskeleton to the existing coral structure.
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Explanation:
Coral reefs are large underwater structures composed of the skeletons of colonial marine invertebrates called coral. ... Each individual coral is referred to as a polyp. Coral polyps live on the calcium carbonate exoskeletons of their ancestors, adding their own exoskeleton to the existing coral structure.
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