phyletic gradualism


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phyletic gradualism

[fī′led·ik ′gra·jə·wə‚liz·əm]
(evolution)
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In his gradualism (or phyletic gradualism), Darwin said that species evolve slowly, rather than suddenly.
Chapter 5 details the history of the "punc eek" controversy following the publication of the paper "Punctuated Equilibria: An Alternative to Phyletic Gradualism" by Niles Eldredge and Stephen Gould, as a chapter in the volume Models in Paleobiology (1972), edited by Thomas J.
Gould, "Punctuated Equlilibria: An Alternative to Phyletic Gradualism," in T.
(47) This neo-catastrophism 'stands in antithesis to the phyletic gradualism presented by the neo-Darwinians'.
Punctuated equilibria: an alternative to phyletic gradualism. In: Models in paleobiology.
While punctuated equilibrium (PE) reflected in the fossil record is a strong negative evidence to the underlying principle of phyletic gradualism (PG) enshrined in the evolutionary theory, the phenomenon of cell-directed mutagenesis challenges another tenet of the theory, namely, the requirement of stochastic mutations produced by extra-cellular agents to create heritable changes in the organism.
Keywords: Cell-directed mutagenesis; Darwinism; gene; directed panspermia; evolutionary tree; mutationism, natural selection; neutral theory; organic evolution; origin of life; phyletic gradualism; neo-Darwinism; species; punctuated equilibrium; synthetic theory; genome; biochip; Darwinism; last universal common ancestor; organic evolution; ruh; natural computer biosystem; natural software engineering; synthetic theory; phylogenetic software differentiation; primordial biochip; transposable elements; programmed organic evolution.
(6.) Niles Eldredge and Stephen Jay Gould, "Punctuated Equilibria: An Alternative to Phyletic Gradualism," in Models in Paleobiology, edited by T.J.M.
Gould, paleontologists, published "Punctuated Equilibria: an Alternative to Phyletic Gradualism." By this they meant that macroevolution--effectively, speciation--does not happen slowly and continuously, but rather by abrupt large jumps separated by long periods of stasis.
Punctuated equilibrium: an alternative to phyletic gradualism. In Schopf, T.
Phyletic gradualism and punctuated equilibrium in the late Neogene planktonic foraminiferal clade Globoconella.
Without some measure of scale of the magnitude of population divergence in the ancestral populations in northern Europe from which the New Zealand founders were drawn, however, this conclusion is rooted firmly in phyletic gradualism. Detailed analyses of variation in Atlantic Island populations relative to their continental counterparts strongly support gradual divergence over the last million to 100,000 years or so in small to moderate-sized populations as the mode of differentiation (Baker et al., 1990a).