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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... .I am fully convincedthat species are not immutable; but that those belongingto what are calledthesame genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of.
... .I am fully convincedthat species are not immutable; but that those belongingto what are calledthesame genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of.
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... varieties of any one species are the descendants of that species. Furthermore, I am convinced that natural selection has been the mostimportant, but not the exclusive, means of modification. C H A P T E R I Variation Under.
... varieties of any one species are the descendants of that species. Furthermore, I am convinced that natural selection has been the mostimportant, but not the exclusive, means of modification. C H A P T E R I Variation Under.
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... descendants of aboriginally distinct species, and by other competent judges as mere varieties. Ifanywell marked distinctionexisted between a domesticrace and aspecies, this source of doubtwould notso perpetually recur. It has often been ...
... descendants of aboriginally distinct species, and by other competent judges as mere varieties. Ifanywell marked distinctionexisted between a domesticrace and aspecies, this source of doubtwould notso perpetually recur. It has often been ...
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... descendants of the wild Indianfowl, Gallusbankiva; and thisisthe conclusion of Mr. Blyth, andof otherswho have studied this birdinIndia. In regard toducks and rabbits, some breeds of which differ much from each other, the evidence is ...
... descendants of the wild Indianfowl, Gallusbankiva; and thisisthe conclusion of Mr. Blyth, andof otherswho have studied this birdinIndia. In regard toducks and rabbits, some breeds of which differ much from each other, the evidence is ...
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... descendants revertingtoanancestor of foreign blood, removed by a greater number of generations. In a breed which has been crossed only once the tendency torevertto any character derived fromsuch acrosswill naturallybecome less and less ...
... descendants revertingtoanancestor of foreign blood, removed by a greater number of generations. In a breed which has been crossed only once the tendency torevertto any character derived fromsuch acrosswill naturallybecome less and less ...
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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