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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... forms, hardly two naturalists agree whether to rank them as species orasvarieties. Wemay instance Rubus, Rosa, and Hieracium amongplants, severalgeneraofinsects, andof Brachiopodshells. Inmost polymorphicgenera some ofthe species have ...
... forms, hardly two naturalists agree whether to rank them as species orasvarieties. Wemay instance Rubus, Rosa, and Hieracium amongplants, severalgeneraofinsects, andof Brachiopodshells. Inmost polymorphicgenera some ofthe species have ...
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... 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 and plants, are not now ...
... 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 and plants, are not now ...
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... forms have permanentlyretained their characters fora long time; foras long, asfaras weknow, as have good andtrue species. Practically, when a naturalist can unite bymeans of intermediate links any two forms, he treats the oneas a ...
... forms have permanentlyretained their characters fora long time; foras long, asfaras weknow, as have good andtrue species. Practically, when a naturalist can unite bymeans of intermediate links any two forms, he treats the oneas a ...
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... forms have been ranked by one botanistas good species, and byanother asmere varieties. Mr. H.C. Watson, to whom I lie under deep obligation ... forms are sufficiently distinct. The geographical races or subspecies are local forms completely.
... forms have been ranked by one botanistas good species, and byanother asmere varieties. Mr. H.C. Watson, to whom I lie under deep obligation ... forms are sufficiently distinct. The geographical races or subspecies are local forms completely.
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... forms and subspecies, they are almostuniversally rankedby naturalists astrue species. Nevertheless, nocertain criterion can possibly be given bywhich variable forms,localforms, sub species and representative species can be recognised ...
... forms and subspecies, they are almostuniversally rankedby naturalists astrue species. Nevertheless, nocertain criterion can possibly be given bywhich variable forms,localforms, sub species and representative species can be recognised ...
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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