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According to the concept of transformational evolution, first clearly articulated by Lamarck, evolution consists of the gradual transformation of organisms from one condition of existence to another.

Ernst Mayr

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Ernst Mayr
Age: 100 †
Born: 1904
Born: July 5
Died: 2005
Died: February 3
Biologist
Curator
Ornithologist
Philosopher
University Teacher
Writer
Zoologist
Kempten/Allgäu
Ernst Walter Mayr
E. Mayr
E. W. Mayr
Clearly
Articulated
Concepts
Gradual
Evolution
Organisms
Conditions
Consists
Existence
Transformation
Another
Concept
Firsts
According
First
Condition
Transformational

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New gene pools are generated in every generation, and evolution takes place because the successful individuals produced by these gene pools give rise to the next generation.
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I have the honesty to say I'm an Atheist. There is nothing that supports the idea of a personal God.
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I feel that one species, mankind, doesn't have the right to exterminate
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There is more to biology than rats, Drosophila, Caenorhabditis, and E. coli.
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Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.
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In those early years in New York when I was a stranger in a big city, it was the companionship and later friendship which I was offered in the Linnean Society that was the most important thing in my life.
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A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive isolation when the external barriers break down.
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Evolution as such is no longer a theory for a modern author. It is as much a fact as that the earth revolves around the sun.
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The most consequential change in man's view of the world, of living nature and of himself came with the introduction, over a period of some 100 years beginning only in the 18th century, of the idea of change itself, of change over periods of time: in a word, of evolution.
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Life is simply the reification of the process of living.
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In neither his definition nor the examples illustrating what memes are does Dawkins mention anything that would distinguish memes from concepts.
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Given the fact of evolution, one would expect the fossils to document a gradual steady change from ancestral forms to the descendants. But this is not what the paleontologist finds. Instead, he or she finds gaps in just about every phyletic series.
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It is curious how often erroneous theories have had a beneficial effect for particular branches of science.
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Indeed, I was unable to find any evidence whatsoever of the occurrence of a drastic evolutionary acceleration and genetic reconstruction in widespread, populous species.
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It seems to me that for Darwin the pulsing of evolutionary rates was a strictly vertical phenomenon.
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The history of science knows scores of instances where an investigator was in the possession of all the important facts for a new theory but simply failed to ask the right questions.
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A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.
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Definitions are temporary verbalizations of concepts, and concepts- particularly difficult concepts- are usually revised repeatedly as our knowledge and understanding grows.
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Evolution ... is opportunistic, hence unpredictable.
Ernst Mayr
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anyone who writes about Darwin's theory of evolutionin the singular, without segregating the theories of gradual evolution, common descent, speciation, and the mechanism of natural selection, will be quite unable to discuss the subject competently.
Ernst Mayr