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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... varying for many generations. No case is on record of a variable organism ceasing to vary under cultivation. Our oldest cultivated plants, such as wheat, still yield new varieties: our oldest domesticated animals are stillcapable ...
... varying for many generations. No case is on record of a variable organism ceasing to vary under cultivation. Our oldest cultivated plants, such as wheat, still yield new varieties: our oldest domesticated animals are stillcapable ...
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... are not easily affected;sowill someanimals and plants withstand domestication or cultivation,and vary very slightly—perhaps hardlymore thanin a state of nature. Some naturalists have maintained that all variations are connected with.
... are not easily affected;sowill someanimals and plants withstand domestication or cultivation,and vary very slightly—perhaps hardlymore thanin a state of nature. Some naturalists have maintained that all variations are connected with.
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... vary insucceeding generations, andwhether it wouldendure other climates? Has the little variability of the ass and goose, or the small power of endurance of warmth bythe reindeer, or of cold by the common camel, preventedtheir ...
... vary insucceeding generations, andwhether it wouldendure other climates? Has the little variability of the ass and goose, or the small power of endurance of warmth bythe reindeer, or of cold by the common camel, preventedtheir ...
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... varies in a highly remarkable manner. The caudal and sacral vertebrae vary innumber; asdoesthe number of the ribs,together with their relative breadth and the presence of processes. Thesize and shape of the apertures in the sternum are ...
... varies in a highly remarkable manner. The caudal and sacral vertebrae vary innumber; asdoesthe number of the ribs,together with their relative breadth and the presence of processes. Thesize and shape of the apertures in the sternum are ...
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... varying, and insensible changes. CIRCUMSTANCES FAVOURABLE TO MAN'S POWER OF SELECTION. I will now say a few words on the circumstances, favourable or the reverse, to man's power ofselection. A high degree of variability is obviously ...
... varying, and insensible changes. CIRCUMSTANCES FAVOURABLE TO MAN'S POWER OF SELECTION. I will now say a few words on the circumstances, favourable or the reverse, to man's power ofselection. A high degree of variability is obviously ...
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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