- 行业: 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 X and Y chromosomes which are responsible for determining whether an individual is a male or a female. Normal males inherit an X from their mother and a Y from their father. Normal females get an X chromosome from both parents. See SRY gene.
Industry:Anthropology
The X and Y chromosomes of males are mostly not homologous--they only share a few genes. Those genes that are found on only the X or the Y chromosome are said to be hemizygous because there is only one copy of each gene. Regardless of whether that gene is a dominant or a recessive allele, it will be expressed in the phenotype of males.
Industry:Anthropology
The volume displaced by the brain within a cranium, or skull case. Cranial capacity is a simple measure of brain size but not necessarily of intelligence.
Industry:Anthropology
The virus that is responsible for causing AIDS.
Industry:Anthropology
The view that the Earth's geological landscape is the result of violent cataclysmic events. Advocates of this theory usually believe that there have been a number of wide-spread violent and sudden natural catastrophes that have destroyed most living things. This idea was used by George Cuvier to explain the extinction of species. Catastrophism was opposed by uniformitarianism during the late 18th and 19th centuries.
Industry:Anthropology
The variety or species of humans that was intermediate between Homo erectus and modern humans. The earliest archaic humans may have appeared shortly after 800,000 years ago in Southern Europe and East Africa. Elsewhere in the Old World, the transition to archaic humans began around 400,000 years ago or later. The most well known late archaic humans were the Neandertals. Archaic humans are also known as archaic Homo sapiens and premodern humans. See Homo heidelbergensis.
Industry:Anthropology
The use of high frequency sound to form an image or picture of internal organs for immediate medical diagnostic purposes. The Ultrasonography device transmits sound waves directly into the body and then accurately records the amount of time for echoes to return to a receiver, much like radar. The sound waves used are at frequencies above the threshold of human hearing--e.g., 20,000 vibrations per second.
Industry:Anthropology
The two large frontal lobes at the top of the brain that make up about 85% of its weight in modern humans. Our high level mental functions, such as speech and processing complex information, occur in the cerebrum. The cerebral cortex, or outer surface, is deeply convoluted. About 2/3 of the human brain surface lies within these folds. The amount of cerebral cortex folding, and subsequently the surface area of the brain, increased as humans evolved from Homo habilis to Homo erectus and ultimately Homo sapiens.
Industry:Anthropology
The twisted ladder shape that is characteristic of DNA molecules.
Industry:Anthropology
The transference of genes from one population to another, usually as a result of migration. The loss or addition of individuals can easily change the gene pool frequencies of both the recipient and donor populations--that is, they can evolve.
Industry:Anthropology
