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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... birds,andwhich hasflowers with separate sexes absolutely requiring the agency of certain insectstobring pollen from one flower to the other, it is equally preposterous to account for the structureof this parasite,with itsrelations to ...
... birds,andwhich hasflowers with separate sexes absolutely requiring the agency of certain insectstobring pollen from one flower to the other, it is equally preposterous to account for the structureof this parasite,with itsrelations to ...
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... birds,with the rarest exception, hardly ever lay fertileeggs. Many exoticplants have pollen utterlyworthless, inthe samecondition asinthemost sterile hybrids. When, on the one hand, we see domesticated animals and plants, though often ...
... birds,with the rarest exception, hardly ever lay fertileeggs. Many exoticplants have pollen utterlyworthless, inthe samecondition asinthemost sterile hybrids. When, on the one hand, we see domesticated animals and plants, though often ...
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... bird,isalso remarkablefrom thewonderful development of the carunculated skinabout the head,and this is accompanied by greatly ... birds the head and tail touch: the oil gland is quite aborted. Several other less distinct breeds might.
... bird,isalso remarkablefrom thewonderful development of the carunculated skinabout the head,and this is accompanied by greatly ... birds the head and tail touch: the oil gland is quite aborted. Several other less distinct breeds might.
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... birds are clothed when hatched. The shape and size of the eggs vary. The manner of flight, and in some breeds the voiceand disposition, differ remarkably. Lastly, in certain breeds, the malesand females have come to differin aslight ...
... birds are clothed when hatched. The shape and size of the eggs vary. The manner of flight, and in some breeds the voiceand disposition, differ remarkably. Lastly, in certain breeds, the malesand females have come to differin aslight ...
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... birds breeding on precipices, and good flyers, are unlikely to be exterminated; and the commonrockpigeon, which has the same habits withthe domesticbreeds, has not been exterminated even on severalof the smaller British islets, or on ...
... birds breeding on precipices, and good flyers, are unlikely to be exterminated; and the commonrockpigeon, which has the same habits withthe domesticbreeds, has not been exterminated even on severalof the smaller British islets, or on ...
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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