On The Origin Of SpeciesHarper Collins, 22 июл. 2014 г. - Всего страниц: 336 Published in 1859, The Origin of Species by Charles Darwin introduced the theory of natural selection to a newly-receptive public. As a young naturalist on the second voyage of HMS Beagle (1831-36), Darwin collected many plant and animal specimens, and it was his close examination of them that eventually led to his theories on evolution and natural selection. HarperPerennial Classics brings great works of literature to life in digital format, upholding the highest standards in ebook production and celebrating reading in all its forms. Look for more titles in the HarperPerennial Classics collection to build your digital library. |
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... occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which couldpossibly have anybearing onit.After five years' workIallowed myselftospeculate ...
... occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which couldpossibly have anybearing onit.After five years' workIallowed myselftospeculate ...
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... occur rarely under nature, butare far from rare under culture. As a single budout ofmany thousands produced year after year on the same tree underuniform conditions,has been known suddenly to assume anew character; andas budson distinct ...
... occur rarely under nature, butare far from rare under culture. As a single budout ofmany thousands produced year after year on the same tree underuniform conditions,has been known suddenly to assume anew character; andas budson distinct ...
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... occur together in any other species of the whole family. Now, in every one of the domestic breeds, taking thoroughly wellbred birds, allthe above marks, even tothe white edging ofthe outer tailfeathers, sometimes concur perfectly ...
... occur together in any other species of the whole family. Now, in every one of the domestic breeds, taking thoroughly wellbred birds, allthe above marks, even tothe white edging ofthe outer tailfeathers, sometimes concur perfectly ...
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... occur whichresemble normal structures in widely different animals. Thus pigshave occasionally been bornwitha sortofproboscis, andif any wild speciesofthe same genus hadnaturally possessed a proboscis, it might havebeenargued thatthishad ...
... occur whichresemble normal structures in widely different animals. Thus pigshave occasionally been bornwitha sortofproboscis, andif any wild speciesofthe same genus hadnaturally possessed a proboscis, it might havebeenargued thatthishad ...
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... occurs under two distinct forms; one of these has strong and differently shapedpincers,and the other hasantennaemuch more abundantlyfurnished withsmellinghairs. Although in most of these cases, the two or three forms, both with animals ...
... occurs under two distinct forms; one of these has strong and differently shapedpincers,and the other hasantennaemuch more abundantlyfurnished withsmellinghairs. Although in most of these cases, the two or three forms, both with animals ...
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according adapted admit advantage allied America amount animals appear become believe belonging birds breeds cause certain characters climate closely color common compared complex considerable considered continued crossed descendants developed difficulty distinct domestic doubt effects existing extinct extremely facts favourable fertility flowers formation forms genera genus geological give given greater groups habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intermediate inthe islands kind known laws less living look manner means modification namely natural selection naturalists nearly observed occasionally occur offspring ofthe onthe organs parent perfect period plants points present preserved principle probably produced remarked represented resemblance respect seeds seems seen separated shown similar single slight sometimes species stage sterility structure successive suppose theory thesame tothe variability variations varieties various vary whole widely young