Phyletic gradualism

Phyletic gradualism

A theoretical model of evolution in which species change slowly at a more or less constant rate through time into other species. See punctuated equilibrium.

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Industry/Domain: Anthropology
Category: Physical anthropology
Company: Palomar College
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phyletic gradualism

Anthropology; Physical anthropology

A theoretical model of evolution in which species change slowly at a more or less constant rate through time into other species. See punctuated equilibrium.

phyletic gradualism

Biology; Biochemistry; Molecular biology

The process of gradual evolutionary change over time.

phyletic gradualism model

Anthropology; Cultural anthropology

The idea that evolution is a slow process with gradual transformation of one population into another.

gradualism

Natural environment; Coral reefs

A model of evolution that assumes slow, steady rates of change, as contrasted with punctuated equilibrium, an evolutionary model in which change occurs in relatively rapid bursts.

gradualism

Archaeology; Human evolution

A theory that evolution progresses by the extension of microevolutionary processes over long periods of time, the gradual modification of populations. The concept does not imply ...

gradualism

Biology; Genetics

A model of evolution that assumes slow, steady rates of change. Charles Darwin's original concept of evolution by natural selection assumed gradualism. Contrast with punctuated ...

malnourishment

Anthropology; Physical anthropology

An inadequacy or an excess of some key element(s) in the diet, such as proteins, fats, or specific minerals and vitamins. See undernourishment and overnourishment.

cataract

Anthropology; Physical anthropology

An impairment of vision caused by the lenses of the eyes becoming cloudy. Cataracts are common in elderly people. They may be inherited or caused by diabetes and environmental ...

oöcyte

Anthropology; Physical anthropology

An immature female sex cell. These egg precursor cells, or primary oöcytes, are produced before birth. They become secondary oöcytes usually one by one after puberty when hormones ...

chronic disease

Anthropology; Physical anthropology

An illness that lasts for a long period of time or indefinitely. In contrast, an acute disease is one with a rapid onset and a short but usually severe course.

microcephaly

Anthropology; Physical anthropology

An extremely rare genetically inherited condition in which babies are born with extremely small brains and heads. This fatal condition has been found only among the children of 23 ...

oxidizable carbon ratio (OCR) dating

Anthropology; Physical anthropology

An experimental dating technique based on the fact that organic carbon in soil humus and charcoal progressively convert to oxidizable carbon over time. The ratios of these two ...

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