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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... Color and constitutional peculiarities go together, of which many remarkable cases couldbe given among animalsand plants. Fromfacts collectedby Heusinger, it appears that white sheep and pigs are injured by certain plants, while ...
... Color and constitutional peculiarities go together, of which many remarkable cases couldbe given among animalsand plants. Fromfacts collectedby Heusinger, it appears that white sheep and pigs are injured by certain plants, while ...
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... color, withthe white loins,double blackwingbar, and barredand whiteedged tailfeathers, as any wild rockpigeon! We can understand these facts, on the wellknown principle of reversion to ancestral characters, if all the domestic breedsare ...
... color, withthe white loins,double blackwingbar, and barredand whiteedged tailfeathers, as any wild rockpigeon! We can understand these facts, on the wellknown principle of reversion to ancestral characters, if all the domestic breedsare ...
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... color and various black marks in all the breeds, bothwhen kept pureand when crossed—and lastly,the mongrel offspringbeing perfectly fertile—from theseseveral reasons, takentogether, wemay safely conclude thatallour domestic breeds are ...
... color and various black marks in all the breeds, bothwhen kept pureand when crossed—and lastly,the mongrel offspringbeing perfectly fertile—from theseseveral reasons, takentogether, wemay safely conclude thatallour domestic breeds are ...
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... color, shape, and hairiness, and yetthe flowers present very slight differences.Itisnot that the varieties whichdiffer largely in some one point do notdiffer at allin otherpoints; this is hardly ever—I speak after careful observation ...
... color, shape, and hairiness, and yetthe flowers present very slight differences.Itisnot that the varieties whichdiffer largely in some one point do notdiffer at allin otherpoints; this is hardly ever—I speak after careful observation ...
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... color of domestic animals was at that early period attended to. Savages now sometimescrosstheir dogs with wild canine animals, to improve thebreed, andthey formerlydidso, as is attested by passages in Pliny. Thesavages in South Africa ...
... color of domestic animals was at that early period attended to. Savages now sometimescrosstheir dogs with wild canine animals, to improve thebreed, andthey formerlydidso, as is attested by passages in Pliny. Thesavages in South Africa ...
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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