- 行业: Government
- Number of terms: 30456
- Number of blossaries: 0
- Company Profile:
NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
The movement of a tidal current away from shore or down a tidal river or estuary.
Industry:Natural environment
The solid rock of the earth's crust that lies under the soil and other unconsolidated earth materials.
Industry:Natural environment
A bond in which a phosphate group joins adjacent carbons through ester linkages.
Industry:Natural environment
A diving apparatus which allows divers to re-breathe exhaled air after removal of carbon dioxide and addition of supplemental oxygen. It is not generally used by recreational scuba divers.
Industry:Natural environment
A plant that grows in soils that have a high content of various salts.
Industry:Natural environment
A solitary or colonial sea squirt of the phylum Chordata, class Ascidiacea. The adult form does not resemble vertebrate chordate animals but the larval stage possesses all basic chordate characteristics. Adult ascidians are sedentary, filter-feeding, cylindrical or globular animals, usually found attached to a substrate. The soft body is surrounded by a thick gelatinous to leathery test, or tunic (which also gives them the name of tunicate), often transparent or translucent. The test is secreted by the body wall of the adult animal. It is composed of cellulose, a carbohydrate unique in the animal kingdom.
Industry:Natural environment
A type of muscle whose function is to pull an appendage or body part inwards, towards the body of an animal.
Industry:Natural environment
An external horny, chitinous or bony plate or scale, such as those on the shell of a turtle.
Industry:Natural environment
