- 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
An examination and dissection of a body of a dead organism in order to determine the cause of death or changes produced by disease.
Industry:Natural environment
Fine-grained carbonate-rich mud; a calcareous clay which contains approximately 30 to 65 percent calcium carbonate.
Industry:Natural environment
One of eight non-branched ciliated canals which originates from the gastric pouches of scyphozoan medusae. The flow of digested food materials is toward the ring canal.
Industry:Natural environment
Rotifers are small invertebrates in the Phylum Rotifera.They range in size from 100 to 2500 microns, with approximately 2000 described species. Rotifers are found in aquatic and semi-aquatic habitats, but are predominantly freshwater inhabitants. Most species are free-living herbivores, bacteriovores or predators, and possess a ciliated, wheel-like organ for feeding and locomotion. Rotifers move by swimming or crawling. Some sessile species are permanently attached to freshwater plants.
Industry:Natural environment
The copulatory organ or clasper of sharks, rays, skates and chimaeras.
Industry:Natural environment
The structure and spatial characterization of all habitat types in a specified area.
Industry:Natural environment
A bar graph in which the area over each class interval is proportional to the relative frequency of data within this interval.
Industry:Natural environment
A device for measuring the height (rise and fall) of the tide; especially an instrument for automatically making a continuous graphic record of tide height versus time.
Industry:Natural environment
