Punctuated equilibrium, or punctuated equilibria, is a theory of evolution which states that changes such as speciation can occur relatively quickly, with long periods of little change—equilibria—in between.
punctuated equilibrium
the relatively sudden appearance of species in the fossil record reflects a relatively rapid process of speciation; ...
Punctuated equilibrium is a theory in evolutionary biology. It states that most sexually reproducing populations will show little change for most of their geological history, and that when phenotypic evolution does occur, it is localized in rare, ...
punctuated equilibrium -- A model of evolution in which change occurs in relatively rapid bursts, followed by longer periods of stasis.
Punctuated Equilibrium
According to another model based on the fossil record, speciation occurs rapidly over a short time, followed by a long period of little or no change. "Short" means thousands or hundreds of thousands of years.
punctuated equilibrium
A theory of evolution advocating spurts of relatively rapid change followed by long periods of stasis.
Punnett square ...
punctuated equilibrium A model that holds that the evolutionary process is characterized by long periods with little or no change interspersed with short periods of rapid speciation.
punctuated equilibrium. A model of evolution in which morphological evolutionary change is discontinuous, being associated primarily with discrete, geologically instantaneous events of speciation leading to phylogenetic branching; ...
Punctuated equilibrium has been presented as a hierarchical theory of evolution. Proponents of punctuated equilibrium see speciation as analogous to mutation and the replacement of one species by another as analogous to natural selection.
Punctuated equilibrium: the belief that evolution proceeds by spurts of change interspersed with long periods of stasis (genetic stability) where selection favors no change.
 See also: Equilibrium, Organ, Evolution, Origin, Species
  
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