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Birth if Stephen Gould
Born in New York City, New York to Leonard and Eleanor (Rosenberg) Gould. -
Married Deborah Lee
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Example of Punctuated Equilibrium
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Punctuated Equilibrium References
https://www.researchgate.net/publication/320180371_Difference_Between_Anagenesis_and_Cladogenesis
http://www.blackwellpublishing.com/ridley/a-z/Phyletic_gradualism.asp
http://www.stephenjaygould.org/biography.html
https://palaeo-electronica.org/2007_3/books/equal.htm
https://www.britannica.com/biography/Stephen-Jay-Gould https://biologydictionary.net/punctuated-equilibrium/
http://www.notablebiographies.com/Gi-He/Gould-Stephen-Jay.html#ixzz5LHS6ix00 -
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Punctuated Equilibrium Part Four
Therefore, cladogenesis is an active evolutionary process compared anagenesis. Punctuated equilibrium is often contrasted by phyletic gradualism as competing theories of evolution. Phyletic gradualism is the idea that evolution usually transpires homogeneously and by the steady and slow transformation of whole lineages called anagenesis, evolution is seen as generally smooth and continuous. -
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Punctuated Equilibrium Part Five
Punctuated equilibrium tries to explain these fossil ‘gaps’ or the absence of intermediate form but stating that they exist for very short periods of time, when speciation occurs intensely in an isolated population. -
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Punctuated Equilibrium
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Punctuated Equilibrium Part One
The biologists Stephen Jay Gould, Niles Eldredge, and many other scientists argued that the large-scale pattern seen in much biological evolution is “punctuated equilibrium.” Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which suggests that most species will exhibit very little change. The species will remain in stasis (equilibrium) until a sudden even disrupts this, resulting in the species to evolve rapidly or perish. -
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Punctuated Equilibrium Part Two
In this sense “rapid” means taking place in thousands of years rather than millions. The rapid periods of change are unsystematic and unpredictable when compared to the simplest kind of natural selection in large populations. The periods of stasis also feature a kind of “homeostasis” in which the hereditary system in the population tends to resist significant change. -
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Punctuated Equilibrium Part Three
Cladogenesis is an evolutionary change of a specific species in which new species are branched off from a shared ancestral species. Cladogenesis is the most common mode of speciation in retort to the changes in the environment. Since multiple species are produced from a single species during cladogenesis, cladogenesis brings biological variety to the environment. -
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Major Works
Gould, Stephen Jay. A Wonderful Life. 1989.
Gould, Stephen Jay. Ontogeny and Phylogeny. 1977.
Gould, Stephen Jay. The Mismeasure of Man . 1981.
Gould, Stephen Jay. Time’s Arrow, Time’s Cycle . 1987. -
Awarded the 1975 Schuchert Award by the Paleontological Society
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Death of Stephen Gould
Died of cancer at age 60 in New York City, New York.
