- المجال: 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 that lives in or on the living tissue of a host organism. It gives its host nothing beneficial in return, and often is injurious and even lethal to the host.
Industry:Natural environment
Comb-like; in mollusks, it refers to the comb-like lamellae of the ctenidia (gills).
Industry:Natural environment
In biology, any of the homologous segments lying in a longitudinal series that make up the body of certain animals, such as earthworms and lobsters. A metamere is also called a 'somite'.
Industry:Natural environment
Is a unit of length often used to measure depth of water and is equivalent to 6 feet or 1.8 meters.
Industry:Natural environment
Pertains to an organism that is essentially bottom living but may feed and swim in the water column.
Industry:Natural environment
The fluid, less structured part of the cytoplasm of a cell, excluding organelles and membranous structures; the portion of the cytoplasm which remains after removal of particulate components.
Industry:Natural environment
The production of offspring (hybrids) from genetically dissimilar parents.
Industry:Natural environment
Segments of chromosomal DNA known to be linked with heritable traits or diseases. Although the markers themselves do not produce the conditions, they exist in concert with the genes responsible and are passed on with them.
Industry:Natural environment
A codon in mrna for which there is no corresponding trna molecule to insert an amino acid into the polypeptide chain. Protein synthesis is terminated and the completed polypeptide is released from the ribosome. Three stop codons are known: UAA, UAG, and UGA. Mutations which generate any of these three codons in a position which normally contains a codon specifying an amino acid are known as 'nonsense mutations'; also called 'nonsense codons.' A stop codon signals the end of the amino acid chain in protein synthesis.
Industry:Natural environment
