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Punctuated equilibrium

Definition

noun

A theory that describes an evolutionary change happening rapidly and in brief geological events in between the long periods of stasis (or equilibrium). The theory is based on the stasis in fossil records, and when phenotypic evolution occurs, it is localized in rare, rapid events of branching speciation.


Supplement

The American paleontologists Niles Eldredge and Stephen Jay Gould first proposed the theory in 1972 to contrast phyletic gradualism, where evolution is described to happen smoothly and continuously.


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Re: mutations and dependencies

... or less) gradually" because there is both gradualism and puncuated equilibrium. This explanation talks about punctuated equilibrium as the result of one or a few mutations that cause large change. However, ...

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by wildfunguy
Tue Feb 19, 2013 7:49 pm
 
Forum: Evolution
Topic: mutations and dependencies
Replies: 29
Views: 14841

Genetics/Cell division/ Mutation

... to a population? Mutation? 6.Whats the difference b/w gradualism and punctuated equilibrium theories of evolution? ^ Gradualism is a smooth change, occurs slowly but steadily ...

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by Ayeshaa
Fri Mar 09, 2012 3:50 am
 
Forum: Evolution
Topic: Genetics/Cell division/ Mutation
Replies: 3
Views: 2452

Re: Theories - Origin of Life

... that process is a random one is it not? Some are, some aren't. Punctuated equilibrium, is it real? Dawkins, Coyne and others say not. Are evolutionary rates universally ...

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by wbla3335
Sun Feb 19, 2012 2:01 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 759092

Re: Theories - Origin of Life

... wish to identify, that process is a random one is it not? So lets see Punctuated equilibrium, is it real? Dawkins, Coyne and others say not. The gradual random mutation that ...

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by scottie
Sat Feb 18, 2012 11:33 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 759092

Re: Theories - Origin of Life

Gavin You raise a valid point regarding Stephen Gould’s view of Punctuated Equilibrium. There are of course several others with their own hypotheses as to how the process ...

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by JackBean
Sat Dec 03, 2011 8:46 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 759092
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