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Phyletic gradualism

Definition

noun

A theory stating that evolutionary change happens slowly, steadily and gradually in an attempt of the species to continue to adapt to new challenges over the course of their history until they became (gradually) new species different from their ancestors.


Supplement

Foraminiferans, a tiny species of marine animals living in Indian ocean, are said to demonstrate this process of evolution. The species remained relatively unchanged from about 10million to 6 million years ago then began a slow modification lasting about 600 000 years till they became an entirely new and different species from their ancestors.


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Re: Theories - Origin of Life

... link This is how Kellogg introduces his proposal. “Introduction Phyletic change, is best defined as “change with respect to time of characteristics ... Gould (1972) have proposed as an alternative to evolution by “phyletic gradualism,” a concept of “punctuated equilibria,” which they believe to ...

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by scottie
Sat Aug 06, 2011 11:29 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929039

Re: Theories - Origin of Life

... Punctuated equilibrium is commonly contrasted against the theory of phyletic gradualism, which states that evolution generally occurs uniformly and by the steady and gradual ...

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by scottie
Sat Apr 16, 2011 7:05 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929039

Re: Experimental evidence for evolution

... to punctuated equilibrium, in fact punctuated equilibrium embodies gradualism. However some advocates of punctuated equilibrium can also allow ... instances of branching evolution. The theory was contrasted against phyletic gradualism , the popular idea that evolutionary change is marked ...

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by Geokinkladze
Mon Sep 06, 2010 12:01 am
 
Forum: Evolution
Topic: Experimental evidence for evolution
Replies: 103
Views: 179663

Cumulative Active Mutation Theory (Part 1)

Mmmm...I think it actually has more to do with phyletic gradualism. But i don't know much about this (not yet), so you judge yourselves when you see it.

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by TheVirus
Mon Nov 02, 2009 5:12 pm
 
Forum: Genetics
Topic: Cumulative Active Mutation Theory (Part 1)
Replies: 6
Views: 2636


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