- 업종: Government
- Number of terms: 30456
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NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
When a sperm cell and ovum from the same organism fuse and form a zygote.
Industry:Natural environment
A population differing from others; refers to a unit below the subspecies level which is not given a taxonomic name.
Industry:Natural environment
A limestone terrain characterized by sinks, caverns, abrupt ridges, protuberant rocks and drainage characteristics due to greater solubility of limestone in natural waters than is common. The term is derived from the geographical name of part of Slovenia.
Industry:Natural environment
A pimple- or wart-like projection; a bump or raised knob on the outside surface of a mollusk shell.
Industry:Natural environment
A soft, wet area periodically or continuously flooded to a shallow depth, usually characterized by a particular group of grasses, cattails and other low plants.
Industry:Natural environment
A type of egg cell that has its yolk in the very center of the cytoplasm, such that the initial meroblastic cleavage of the zygote happens all around the embryo. Most arthropods have centrolecithal eggs.
Industry:Natural environment
An estimate of the amount of living matter per some unit volume or area.
Industry:Natural environment
Any species of sponge generally occurring at depths below 50 m that provides vertical structure above the sea floor and can occur at a population density such that they promote the development of associated communities .
Industry:Natural environment
