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" Natural selection acts exclusively by the preservation and accumulation of variations, which are beneficial under the organic and inorganic conditions to which each creature is exposed at all periods of life. The ultimate result is that each creature... "
A House Built on Sand: Exposing Postmodernist Myths About Science - Pagina 125
geredigeerd door - 1998 - 336 pagina’s
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On the Origin of Species by Means of Natural Selection; Or, The Preservation ...

Charles Darwin - 1861 - 440 pagina’s
...tendency to an indefinite augmentation of specific forms. Natural Selection acts, as we have seen, exclusively by the preservation and accumulation of...beneficial under the organic and inorganic conditions of life to which each creature is at each successive period exposed. The ultimate result will be that...
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On the Origin of Species by Means of Natural Selection: Or, The Preservation ...

Charles Darwin - 1864 - 440 pagina’s
...tendency to an indefinite augmentation of specific forms. Natural Selection acts, as we have seen, exclusively by the preservation and accumulation of...beneficial under the organic and inorganic conditions of life to which each creature is at each successive period exposed. The ultimate result will be that...
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On the Origin of Species by Means of Natural Selection: Or The Preservation ...

Charles Darwin - 1866 - 593 pagina’s
...inorganic conditions of life to which each creature has been exposed at each successive period of time. The ultimate result is that each creature tends to...more and more improved in relation to its conditions of life. This improvement inevitably leads to the gradual advancement of the organisation of the greater...
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The Problem of Human Life: Embracing the "evolution of Sound" and "evolution ...

Alexander Wilford Hall - 1880 - 512 pagina’s
...natural selection, which only acts on useful variations. I will quote here but two passages. He says: — "Natural selection acts exclusively by the preservation...accumulation of variations which are beneficial." " Natural selection acts only by the preservation and accumulation of small inherited modifications,...
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The Problem of Human Life: Embracing the "evolution of Sound" and "evolution ...

Alexander Wilford Hall - 1883 - 524 pagina’s
...produce no great sudden modifications [such as a useful wing]; it can act only by short and slow steps." "Natural selection acts exclusively by the preservation and accumulation of variations which are Itneficial." — DARWIN, Origin of Species, pp. 97, 156, 180, 413. The reader can not misunderstand...
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The Journal of Science, and Annals of Astronomy, Biology, Geology ..., Volume 18

James Samuelson, William Crookes - 1881
...variations occur ;" that is, favourable to the development of new species. Natural selection, he observes, acts exclusively "by the preservation and accumulation...beneficial under the organic and inorganic conditions of life to which each creature is at each successive period exposed." Hence Mr. Darwin consigns the...
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Journal of Science, and Annals of Astronomy, Biology, Geology ..., Volume 18

1881
...variations occur ;" that is, favourable to the development of new species. Natural selection, he observes, acts exclusively "by the preservation and accumulation...beneficial under the organic and inorganic conditions of life to which each creature is at each successive period exposed." Hence Mr. Darwin consigns the...
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On the Origin of Species by Means of Natural Selection: Or, The Preservation ...

Charles Darwin - 1882 - 458 pagina’s
...orders, and classes, as at the present time. On Me Dtgree to wliich Organisation tends to advance. Natural Selection acts exclusively by the preservation and accumulation of variations, which arc beneficial under the organic and inorganic conditions to which each creature is exposed at all...
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Microcosm, Volume 8

1891
...useless but absolutely injurious during numberless generations of incipiency, forreasons given. As "natural selection acts exclusively by the preservation and accumulation of variations which are benefl'"ia/"and " the destrttction of those which are injurious," it could have done nothing toward...
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Theism and Evolution: An Examination of Modern Speculative Theories as ...

Joseph Smith Van Dyke - 1886 - 461 pagina’s
...successive variations." "Natural selection acts solely by accumulating slight favorable variations." " Natural selection acts exclusively by the preservation...accumulation of variations which are beneficial." " Every variation which is not inherited is unimportant for us." " Natural selection acts only by the...
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