punctuated evolution


punctuated evolution
  Model of evolution in which species are relatively stable and long-lived, and in which new species appear during concentrated outbursts of rapid speciation followed by differential success of some of those species.

Expanded glossary of Cycad terms . 2014.

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  • punctuated evolution — /ˌpʌnktʃueɪtəd ɛvəˈluʃən/ (say .punkchoohaytuhd evuh loohshuhn) noun the view of evolution that corresponds to the theory of punctuated equilibrium …   Australian English dictionary

  • Punctuated equilibrium — is a theory of evolutionary biology which states that most sexually reproducing populations experience little change for most of their geological history, and that when phenotypic evolution does occur, it is localized in rare, rapid events of… …   Wikipedia

  • punctuated equilibrium — or punctuated equilibria n. a theory of evolution holding that characteristics of living organisms remain relatively stable for long periods that are infrequently interrupted, or punctuated, by brief periods of relatively rapid evolutionary… …   English World dictionary

  • punctuated equilibria — punctuated equilibrium or punctuated equilibria noun (biology) (a theory which states that evolution happens in) short bursts of major change that interrupt long periods of stability • • • Main Entry: ↑punctuate …   Useful english dictionary

  • punctuated equilibrium — evolution in rapid bursts followed by long periods without change as opposed to gradualism, q.v …   Dictionary of ichthyology

  • evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …   Universalium

  • Evolution — This article is about evolution in biology. For other uses, see Evolution (disambiguation). For a generally accessible and less technical introduction to the topic, see Introduction to evolution. Part of a series on …   Wikipedia

  • Punctuated equilibrium — Der Punktualismus (englisch Punctuated equilibrium, im Jargon abgekürzt Punk Eek) ist eine von den amerikanischen Paläontologen Niles Eldredge und Stephen Jay Gould erstmals 1972 vorgestellte Theorie zur Erklärung von diskontinuierlichen… …   Deutsch Wikipedia

  • punctuated equilibrium — noun a theory of evolution holding that evolutionary change in the fossil record came in fits and starts rather than in a steady process of slow change • Syn: ↑theory of punctuated equilibrium • Hypernyms: ↑theory of evolution, ↑theory of organic …   Useful english dictionary

  • punctuated equilibrium — noun A theory of evolution holding that evolutionary change tends to be characterized by long periods of stability, or equilibrium, punctuated by episodes of very fast development …   Wiktionary