28 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
Almost atoll
Natural environment; Coral reefs
An atoll whose rim is less than 75 percent complete as a circle at low tide.
Microvillus
Natural environment; Coral reefs
Any of the minute hairlike structures projecting from the surface of certain types of cells.
Gastric filaments
Natural environment; Coral reefs
In scyphozoan medusae, a fringe of short, threadlike filaments whose secretory cells secrete digestive enzymes. They are located on the floor of each gastric pouch .
Background noise
Natural environment; Coral reefs
Noise coming from sources other than the noise source being monitored.
Radiocarbon time
Natural environment; Coral reefs
Regular known rates of radiocarbon decay that are used to determine the exact ages of carbon-based life.
Doppler shift
Natural environment; Coral reefs
The change in the tone of a sound caused by the sound source moving away or towards the listener.