- 行业: Government
- Number of terms: 30456
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NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
A juvenile coral of some species that is attached to the substrate either directly or on a stalk.
Industry:Natural environment
A notched margin, but not so deeply as to be forked. As an example, a trout possesses an emarginate caudal fin.
Industry:Natural environment
A situation in which the best-fitting regression line is a straight line.
Industry:Natural environment
A thin outer covering of a hydranth, the feeding polyp, of a colonial hydrozoan.
Industry:Natural environment
Any of a group of red, orange, and yellow accessory pigments of plants or algae.
Industry:Natural environment
Dive tables present dive times for specific depths, adherence to which, the scuba diver can avoid contracting decompression sickness (the bends). The theory behind dive tables is based on our understanding of how nitrogen is taken up on compression (descent) and given off on decompression (ascent). The first dive tables were devised by John S. Haldane in the period 1906-1908.
Industry:Natural environment
In mollusks, refers to having gill lamellae on one side of the ctenidial axis.
Industry:Natural environment
