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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... belong to the same species. Having keptnearly all the English breeds of the fowl alive, having bred and crossed them, and examined their skeletons, it appearsto me almost certain that all are the descendants of the wild Indianfowl ...
... belong to the same species. Having keptnearly all the English breeds of the fowl alive, having bred and crossed them, and examined their skeletons, it appearsto me almost certain that all are the descendants of the wild Indianfowl ...
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... belonging to two or more distinct breeds are crossed, none of which are blue or have any of the abovespecified marks, the mongrel offspring are very apt suddenlyto acquire these characters.Togive oneinstance out of several whichIhave ...
... belonging to two or more distinct breeds are crossed, none of which are blue or have any of the abovespecified marks, the mongrel offspring are very apt suddenlyto acquire these characters.Togive oneinstance out of several whichIhave ...
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... belong to poor people, and are mostly IN SMALL LOTS, theynever canbeimproved.” On the other hand, nurserymen,from keeping large stocksofthe same plant, aregenerally far more successfulthan amateurs inraising new and valuable varieties ...
... belong to poor people, and are mostly IN SMALL LOTS, theynever canbeimproved.” On the other hand, nurserymen,from keeping large stocksofthe same plant, aregenerally far more successfulthan amateurs inraising new and valuable varieties ...
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... belonging to thesame genus.So with plants,the seedsof the different varieties of thebean or maize probably differ more in size than do the seeds of the distinct species in any one genus in the same twofamilies. The same remark holds ...
... belonging to thesame genus.So with plants,the seedsof the different varieties of thebean or maize probably differ more in size than do the seeds of the distinct species in any one genus in the same twofamilies. The same remark holds ...
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... belonging tothe oakfamily,at least twothirds are provisional species, thatis, arenotknown strictly tofulfil the definition above given ofa true species.It should be added that De Candolle no longer believes that species are immutable ...
... belonging tothe oakfamily,at least twothirds are provisional species, thatis, arenotknown strictly tofulfil the definition above given ofa true species.It should be added that De Candolle no longer believes that species are immutable ...
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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