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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... slight variations. I will thenpass on tothevariability ofspecies in a state of nature; but I shall, unfortunately, be compelled to treat this subject far too briefly, asit can be treated properly only by giving long cataloguesof facts ...
... slight variations. I will thenpass on tothevariability ofspecies in a state of nature; but I shall, unfortunately, be compelled to treat this subject far too briefly, asit can be treated properly only by giving long cataloguesof facts ...
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... slight changes, such assize from the amount of food,colorfrom the natureof the food, thicknessofthe skin andhairfrom climate, etc. Eachof the endless variations whichwe see in theplumage of our fowls must have had some efficient cause ...
... slight changes, such assize from the amount of food,colorfrom the natureof the food, thicknessofthe skin andhairfrom climate, etc. Eachof the endless variations whichwe see in theplumage of our fowls must have had some efficient cause ...
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... slight or strongly marked, whichappear amongmany individuals living together, may be considered as the indefinite effects oftheconditions of life on each individual organism, in nearly thesamemanner asthe chill effectsdifferent menin an ...
... slight or strongly marked, whichappear amongmany individuals living together, may be considered as the indefinite effects oftheconditions of life on each individual organism, in nearly thesamemanner asthe chill effectsdifferent menin an ...
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... slight degree from that of the parentaltype. Any variationwhich isnot inherited is unimportantfor us.But the number and diversity of inheritable deviations of structure, both those of slight and those of considerable physiological ...
... slight degree from that of the parentaltype. Any variationwhich isnot inherited is unimportantfor us.But the number and diversity of inheritable deviations of structure, both those of slight and those of considerable physiological ...
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... slight deviations intheir structure, in such case, I grant that we could deduce nothing from domesticvarieties inregardto species. But there is not a shadow of evidence infavour of thisview:toassert that we could not breed ourcart and ...
... slight deviations intheir structure, in such case, I grant that we could deduce nothing from domesticvarieties inregardto species. But there is not a shadow of evidence infavour of thisview:toassert that we could not breed ourcart and ...
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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