- 行业: 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 apomorphy (derived character differing from the ancestral condition) possessed by a species or clade that is shared with no other species or clade, i.e., a derived character found only in a terminal taxon.
Industry:Natural environment
Anterior concentration of nervous tissue in several invertebrate groups, such as mollusks, annelid worms, sipunculids (peanut worms), and echiurans (spoon worms or innkeeper worms).
Industry:Natural environment
In fishes, the flattened bony plate at the posterior end of the vertebral column.
Industry:Natural environment
Random changes in the frequency of alleles in a population. In small populations, it can lead to the elimination of a particular allele by chance alone. It is thought to be one cause of speciation when a group of organisms is separated from its parent population.
Industry:Natural environment
The area represented by each pixel of a satellite image. The smaller the area represented by a pixel, the more accurate and detailed the image .
Industry:Natural environment
The large-scale movement of a population for some specific purpose.
Industry:Natural environment
The reproductive mode where the eggs hatch and develop in the female's reproductive tract (or a specialized pouch in the males of some species), are not nourished in any way by the female, and are free-swimming when released from the parent.
Industry:Natural environment
Type of dentition where the teeth are all similar, indicative of a uniform diet.
Industry:Natural environment
