- Industry: 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 small celestial body orbiting a larger one; a man-made object designed to orbit a celestial body.
Industry:Natural environment
A toxic substance which interferes with the electrical activities of nerves and inhibits, damages or destroys the tissues of the nervous system, especially neurons (nerve cells) .
Industry:Natural environment
An echinoderm characterised by radial symmetry, and usually with five arms (rays) radiating from a central body. Minute pincer-like structures on the arms, called pedicellaria, ensure that the surface of the arms stay free from algae. There are a few sea stars that have 6 or 7 arms, and some with even more. Injuries will also cause more arms to grow. The majority of sea stars are carnivorous and feed on sponges, bryozoans, ascidians and mollusks. Other are detritus feeders or scavengers. Some sea stars, for example the crown-of-thorns that feeds on coral polyps, are specialised feeders; also called "starfish" .
Industry:Natural environment
In sponges, a cavity lined with choanocytes and located between incurrent and excurrent systems.
Industry:Natural environment
Not normal; contrary to the usual structure, position, behaviour or rule.
Industry:Natural environment
Relating to or coming from the south; of the south temperate region, between the antarctic and tropical regions.
Industry:Natural environment
The chemically precipitated calcium carbonate present in spaces within skeletons or between grains of internal sediment.
Industry:Natural environment
The mechanical or chemical decomposition of rocks due to weather .
Industry:Natural environment
Water circulatory system in sponges composed of choanoderm, pores and chambers.
Industry:Natural environment
A biotic or abiotic factor acting on an organism or population from outside the organism or population.These are the physical and chemical features of the environment, as well as other organisms.
Industry:Natural environment
