- 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
An organism (or species) that is not adaptable to human alterations to its environment and thus declines in number where alterations occur.
Industry:Natural environment
Classification which stresses common descent and tends to unite ancestral and descendant groups of a phyletic line in a single higher taxon, separating them from contemporaneous taxa having reached a similar grade of evolutionary change.
Industry:Natural environment
The eye of arthropods, most highly developed in insects and crustaceans. It consists of a group of functionally related visual elements (ommatidia), each having its own refractive system and each forming a portion of an image.
Industry:Natural environment
The water beneath the permanent thermocline that usually has a low and uniform temperature.
Industry:Natural environment
Procedures used to join together DNA segments in a cell-free system. Under appropriate conditions, a recombinant DNA molecule can enter a cell and replicate there, either autonomously, or after it has become integrated into a cellular chromosome.
Industry:Natural environment
A class of organic compound produced by soft corals for defense and for aggressive colonization of new substrates.
Industry:Natural environment
