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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... hybrids. When, on the one hand, we see domesticated animals and plants, though often weak and sickly, breeding freely under confinement; andwhen, on the otherhand,we see individuals,though taken youngfrom astateofnature perfectly tamed ...
... hybrids. When, on the one hand, we see domesticated animals and plants, though often weak and sickly, breeding freely under confinement; andwhen, on the otherhand,we see individuals,though taken youngfrom astateofnature perfectly tamed ...
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... hybrids ormongrels frombetween all thebreeds of the pigeon are perfectlyfertile, asI can statefrommy own observations, purposely made, onthemost distinct breeds. Now, hardly any cases have been ascertained with certainty of hybrids from ...
... hybrids ormongrels frombetween all thebreeds of the pigeon are perfectlyfertile, asI can statefrommy own observations, purposely made, onthemost distinct breeds. Now, hardly any cases have been ascertained with certainty of hybrids from ...
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... hybrids and of mongrels, and the sterility of hybrids; butplantsnot propagated by seed are of little importance to us, for theirendurance is only temporary. Overall these causes of change,the accumulative action ofselection, whether ...
... hybrids and of mongrels, and the sterility of hybrids; butplantsnot propagated by seed are of little importance to us, for theirendurance is only temporary. Overall these causes of change,the accumulative action ofselection, whether ...
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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