Quantum evolution, which like the other modes occurs at all levels, but is most important and distinctive at relatively high levels, is so called because it typically results from a sort of all-or-none reaction; an evolutionary change, definite in quantity, is either completed at a relatively high rate or it is not completed at all, and the population involved simply dies out. [...] It is the present thesis that quantum evolution also occurs on a a larger scale and in clear distinction from any usual phase of speciation and phyletic evolution.
Result of Your Query
quantum evolutionQuantenevolution (ger.)
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Comparatively rapid transition from one stable type of biological adaptation to another distinctly different type under the influence of some strong selection pressure. (Merriam Webster 2011)
- 1944
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Simpson, G.G. (1944). Tempo and Mode in Evolution: 199; 206.
- 1982
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quantum evolution A rapid evolutionary shift to a new adaptive zone under strong selection pressure.
Lincoln, R.J., Boxshall, G.A. & Clark, P.F. (1982). A Dictionary of Ecology, Evolution and Systematics: 209.