- 업종: Education
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Founded in 1946, Palomar College is a public two-year community college in the city of San Marcos, located in north San Diego County, California. Palomar offers over 300 associate degree, certificate programs and is designated by the U.S. Department of Education as an Hispanic-Serving Institution ...
The process by which amino acids change from the L-molecule form to their mirror image D-molecule form. This occurs naturally following the death of cells. See amino acid racemization dating.
Industry:Anthropology
The position on a chromosome where a given gene occurs. The term is sometimes used interchangeably with gene, but this usage is technically incorrect.
Industry:Anthropology
The point on the northern extremity of the earth where the axis of rotation is located. Compared to the magnetic north pole, the rotational one is relatively stable.
Industry:Anthropology
The plural of subphylum (the level of classification immediately below phylum and above class in the Linnaean classification system).
Industry:Anthropology
The physical form or structure of an organism or another object. Species are usually identified from the fossil record based on morphological traits.
Industry:Anthropology
The phylum of animals that is characterized by elongated bilaterally symmetrical bodies. In some phase of their life cycle, they have a notochord and gill slits or pouches. Chordates also often have a head, a tail, and a digestive system with an opening at both ends of the body. The Chordata include fish, amphibians, reptiles, birds, mammals, and 2 invertebrate subphyla (tunicates and lancelets).
Industry:Anthropology
The period of time when female animals are sexually excited and receptive to mating. Estrus occurs around the time of ovulation in many species.
Industry:Anthropology
The period between conception and birth during which an unborn young is within its mother's uterus. Pregnancy is another word for gestation.
Industry:Anthropology
The pattern of non-branching evolution that results from successive speciation in a single evolutionary line.
Industry:Anthropology
The pattern of human evolution in which the effects of natural selection are altered by cultural inventions. Culture can alter the direction of evolution by creating non-biological adaptations to environmental stresses (e.g., wearing insulating clothes on very cold days). This potentially reduces the need to evolve genetic responses to the stresses. This has meant that we have been able to remain essentially tropical animals biologically and live in colder regions of our planet. Biocultural evolution can also involve a mutual, interactive evolution of human biology and culture. An example of this has been the selection favoring sickle-cell trait in Africa. Human agricultural practices altered the environment, which resulted in factors that were advantageous to both the malarial microorganisms and the mosquitoes that transmit them between people. This, in turn, selected for the sickling allele.
Industry:Anthropology
