20 Terms
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Coral reefs
Coral reefs are structures formed from the calcium carbonate secretions of corals. They are colonies of tiny animals in marine areas containing few nutrients.
Industry: Natural environment
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Coral reefs
parts per million (ppm)
Natural environment; Coral reefs
Number of parts of a substance found in one million parts of a particular gas, liquid, or solid.
perisarc
Natural environment; Coral reefs
The chitinous outer coat of common tissue connecting individuals in some colonial hydrozoans.
abrasion
Natural environment; Coral reefs
The mechanical process of gradually breaking down a hard layer.
epidemic spawning
Natural environment; Coral reefs
The simultaneous shedding of gametes by a large number of individuals.
