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Books Books 1 - 10 of 38 on A structure used only once in an animal's life, if of high importance to it, might....
" A structure used only once in an animal's life, if of high importance to it, might be modified to any extent by natural selection; for instance, the great jaws possessed by certain insects, used exclusively for opening the cocoon, or the hard tip... "
The Origin of Species
by Charles Darwin - 19?? - 238 pages
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On the Origin of Species by Means of Natural Selection, Or The Preservation ...

Charles Darwin - Evolution - 1875 - 458 pages
...perish in the egg than are able to get out of it ; so that fanciers assist in the act of hatehing. Now if nature had to make the beak of a full-grown...of natural selection. For instance a vast number of ejrgs or seeds are annually devoured, and these could be modified through natural selection only if...
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On the Origin of Species: By Means of Natural Selection, Or, the ...

Charles Darwin - Evolution - 1883 - 458 pages
...certain insects, used exclusively for opening the cocoon or the hard tip to the beak of unmatched birds, used for breaking the egg. It has been asserted,...better adapted to their conditions of life than any of those which happened to survive. So again a vast number of mature animals and plants, whether or not...
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Proceedings of the Bristol Naturalists' Society, Volume 5

1888
...then, are the modes of elimination. Observe that it is a differentiating process. As Darwin says : " It may be well here to remark, that with all beings...no influence on the course of natural selection."* The antbear swallowing a tongue-load of ants ; balaenoptera engulfing whole shoals of herrings ; the...
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Proceedings

Bristol Naturalists' Society (Avon) - Natural history - 1886
...the modes of elimination. Observe that it is a differentiating process. As Darwin says : " It maybe well here to remark, that with all beings there must...no influence on the course of natural selection." * The antbear swallowing a tongue-load of ants ; balaenoptera engulfing whole shoals of herrings ;...
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Nature Versus Natural Selection: An Essay on Organic Evolution

Charles Clement Coe - Evolution - 1895 - 591 pages
...fertilised and become a fish at all. Moreover in the case of the fertilised egg and of the young fry " there must be much fortuitous destruction, which can...no influence on the course of Natural Selection."* But not only is it impossible to conceive of a strict selection, a discriminative destruction in the...
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Nature Versus Natural Selection: An Essay on Organic Evolution

Charles Clement Coe - Evolution - 1895 - 591 pages
...sense of indiscriminative, non-selective death. This Mr. Darwin admits. " With all beings there is much fortuitous destruction which can have little or no influence on the course of Natural Selection."f When John of Gaunt thanks the King because his son's exile has been shortened by four...
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Charles Darwin's Works: The origin of species by means of natural selection ...

Charles Darwin, Sir Francis Darwin - Science - 1896
...contingencies, wholly different from those which concern the mature insect ; and these modifications may effect, through correlation, the structure of the adult. So,...better adapted to their conditions of life than any of those which happened to survive. So again a vast number of mature animals and plants, whether or not...
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The Origin of Species by Means of Natural Selection, Or, The ..., Volume 1

Charles Darwin - Evolution - 1896
...short-beaked tumbler-pigeons a greater number perish in the egg than are able to get out of it ; 30 that fanciers assist in the act of hatching. Now if...better adapted to their conditions of life than any of those which happened to survive. So again a vast number of mature animals and plants, whether or not...
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Library of the world's best literature, ancient and modern, Volume 11

Charles Dudley Warner - Literary Collections - 1897
...for opening the cocoon, or the hard tip to the beak of unhatched birds, used for breaking the eggs. It has been asserted that of the best short-beaked...better adapted to their conditions of life than any of those which happened to survive. So again a vast number of mature animals and plants, whether or not...
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Evolution and Adaptation

Thomas Hunt Morgan - Adaptation (Biology). - 1903 - 470 pages
...this way. We come now to a point that touches the theory of natural selection in a very vital spot. " It may be well here to remark that with all beings...better adapted to their conditions of life than any of those which happened to survive. So again a vast number of mature animals and plants, whether or not...
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