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Gradualism

Gradualism


Gradualism, also called phyletic gradualism, is the view that the course of evolution is gradual with small changes accumulating through time. Gradualism is opposed to punctualism, where evolutionary change is thought to happen in short episodes of rapid evolution followed by long periods of stasis when little or no evolutionary change occurs. The latter view is based on the interpretation of the fossil record and is common among palaeontologists, whereas the former view builds on a version of population genetics theory. However, most evolutionary biologists hold the view that the two concepts are not necessarily contradictory because gradual changes in genotype may occasionally lead to major changes in phenotype.


See also Catastrophism; Evolution; Punctuated Equilibrium


volker loeschcke

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"Gradualism." Encyclopedia of Science and Religion. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

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"Gradualism." Encyclopedia of Science and Religion. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/education/encyclopedias-almanacs-transcripts-and-maps/gradualism

gradualism

grad·u·al·ism / ˈgrajoōəˌlizəm/ • n. a policy of gradual reform rather than sudden change or revolution. ∎ Biol. the hypothesis that evolution proceeds chiefly by the accumulation of gradual changes (in contrast to the punctuationist model). DERIVATIVES: grad·u·al·ist n. grad·u·al·is·tic / ˌgrajəwəˈlistik/ adj.

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"gradualism." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"gradualism." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/gradualism

"gradualism." The Oxford Pocket Dictionary of Current English. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/gradualism

gradualism

gradualism See PHYLETIC GRADUALISM.

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"gradualism." A Dictionary of Earth Sciences. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"gradualism." A Dictionary of Earth Sciences. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism

"gradualism." A Dictionary of Earth Sciences. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism

gradualism

gradualism See phyletic gradualism.

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"gradualism." A Dictionary of Ecology. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"gradualism." A Dictionary of Ecology. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-0

"gradualism." A Dictionary of Ecology. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-0

gradualism

gradualism See PHYLETIC GRADUALISM.

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"gradualism." A Dictionary of Plant Sciences. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"gradualism." A Dictionary of Plant Sciences. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-1

"gradualism." A Dictionary of Plant Sciences. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-1

gradualism

gradualism See PHYLETIC GRADUALISM.

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"gradualism." A Dictionary of Zoology. . Encyclopedia.com. 20 Jul. 2017 <http://www.encyclopedia.com>.

"gradualism." A Dictionary of Zoology. . Encyclopedia.com. (July 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-2

"gradualism." A Dictionary of Zoology. . Retrieved July 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gradualism-2