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Gradualism
GradualismGradualism, 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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LOESCHCKE, VOLKER. "Gradualism." Encyclopedia of Science and Religion. 2003. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. LOESCHCKE, VOLKER. "Gradualism." Encyclopedia of Science and Religion. 2003. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1G2-3404200245.html LOESCHCKE, VOLKER. "Gradualism." Encyclopedia of Science and Religion. 2003. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1G2-3404200245.html |
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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. 2009. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "gradualism." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O999-gradualism.html "gradualism." The Oxford Pocket Dictionary of Current English. 2009. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-gradualism.html |
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gradualism
gradualism See PHYLETIC GRADUALISM.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "gradualism." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "gradualism." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-gradualism.html AILSA ALLABY and MICHAEL ALLABY. "gradualism." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-gradualism.html |
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gradualism
gradualism See phyletic gradualism.
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MICHAEL ALLABY. "gradualism." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "gradualism." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-gradualism.html MICHAEL ALLABY. "gradualism." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-gradualism.html |
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gradualism
gradualism See PHYLETIC GRADUALISM.
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Cite this article
MICHAEL ALLABY. "gradualism." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "gradualism." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O7-gradualism.html MICHAEL ALLABY. "gradualism." A Dictionary of Plant Sciences. 1998. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-gradualism.html |
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gradualism
gradualism See PHYLETIC GRADUALISM.
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Cite this article
MICHAEL ALLABY. "gradualism." A Dictionary of Zoology. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "gradualism." A Dictionary of Zoology. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O8-gradualism.html MICHAEL ALLABY. "gradualism." A Dictionary of Zoology. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-gradualism.html |
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