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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... occasionally revert insomeof their characters to ancestral forms, it seems to menot improbable that if we could succeed in naturalising, or wereto cultivate, during manygenerations, the several races, for instance, ofthe cabbage, in ...
... occasionally revert insomeof their characters to ancestral forms, it seems to menot improbable that if we could succeed in naturalising, or wereto cultivate, during manygenerations, the several races, for instance, ofthe cabbage, in ...
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... occasional crossesif aidedby the careful selection ofthe individuals which present the desired character;but toobtain a race intermediate between twoquite distinct races wouldbe very difficult. Sir J. Sebright expressly experimented ...
... occasional crossesif aidedby the careful selection ofthe individuals which present the desired character;but toobtain a race intermediate between twoquite distinct races wouldbe very difficult. Sir J. Sebright expressly experimented ...
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... occasional reappearance of the blue 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 ...
... occasional reappearance of the blue 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 ...
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... occasional preservation of the best individuals, whether or not sufficiently distinct to be ranked attheir first appearance as distinct varieties, and whether or not twoormore species or races have become blended together by crossing ...
... occasional preservation of the best individuals, whether or not sufficiently distinct to be ranked attheir first appearance as distinct varieties, and whether or not twoormore species or races have become blended together by crossing ...
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... occasionally appear,but these are rejected as faults or deviations from the standard of perfection in each breed. The common goose has not given rise to any marked varieties; hence the Toulouse andthe common breed, whichdiffer only in ...
... occasionally appear,but these are rejected as faults or deviations from the standard of perfection in each breed. The common goose has not given rise to any marked varieties; hence the Toulouse andthe common breed, whichdiffer only in ...
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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