- 行业: Education
- Number of terms: 12355
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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 ...
Gestures, postures, and facial expressions used to communicate nonverbally.
Industry:Anthropology
Genetic change in a population of organisms that occurs over time. The term is also frequently used to refer to the appearance of a new species. More specifically, it is change in the frequencies of alleles in a population's gene pool from one generation to the next.
Industry:Anthropology
Genes that are on the same chromosome and subsequently are inherited together as a package unless crossing-over separates them.
Industry:Anthropology
Flakes of more or less standardized shapes and sizes made with a specific technique in the Mousterian tool tradition of the Neandertals and some of their contemporaries. Flint and other brittle fracturing rock cores were percussion flaked on one side until a convex "tortoise shell" shape was formed. Then, a heavy percussion blow at one end of the core removed a large flake that was convex on one side and relatively flat on the other. This was a Levallois flake.
Industry:Anthropology
Evolution, or change in gene pool frequencies, resulting from random chance. Genetic drift occurs most rapidly in small populations. In large populations, random deviations in allele frequencies in one direction are more likely to be cancelled out by random changes in the opposite direction.
Industry:Anthropology
Environmental pressure that is placed on individuals within a population that results in change of the genetic makeup of the next generation. Selective pressure is the driving force of natural selection.
Industry:Anthropology
Enlargement in the diameter of blood vessels so that an increased flow occurs. See vasoconstriction.
Industry:Anthropology
Embryonic cells that have not yet become specialized tissue cells--they potentially can develop into any type of tissue in the body. Children and adults retain somewhat specialized stem cells in their bone marrow. These stem cells are the source of the major blood cells--erythrocytes, leukocytes, and thrombocytes (platelets).
Industry:Anthropology
Electromagnetic radiation ranging in wave length just beyond violet in the visible spectrum of light. The human eye cannot detect u. V. Our sun is the major source of u. V. Radiation on earth. Prolonged exposure to u. V. Can result in destructive skin burns and can promote the onset of skin cancer.
Industry:Anthropology
