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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... whole organisation or on certain parts alone and in directly by affecting thereproductive system. With respect to the direct action, we must bear in mind that in every case, as Professor Weismann has latelyinsisted, and as I have ...
... whole organisation or on certain parts alone and in directly by affecting thereproductive system. With respect to the direct action, we must bear in mind that in every case, as Professor Weismann has latelyinsisted, and as I have ...
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... use or disuse of parts has had a more marked influence; thus I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in.
... use or disuse of parts has had a more marked influence; thus I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in.
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... whole organisation seems to have become plastic, and departs ina slight degree from that of the parentaltype. Any variationwhich isnot inherited is unimportantfor us.But the number and diversity of inheritable deviations of structure ...
... whole organisation seems to have become plastic, and departs ina slight degree from that of the parentaltype. Any variationwhich isnot inherited is unimportantfor us.But the number and diversity of inheritable deviations of structure ...
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... whole subject would be, to look attheinheritance ofevery character whatever as the rule, and noninheritanceas the anomaly. The laws governing inheritance are for themost partunknown; no one can say why the same peculiarity in different ...
... whole subject would be, to look attheinheritance ofevery character whatever as the rule, and noninheritanceas the anomaly. The laws governing inheritance are for themost partunknown; no one can say why the same peculiarity in different ...
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... many foxes—inhabiting the different quarters of the world. I do notbelieve, asweshall presently see,thatthe whole amount of difference between the several breeds of the dog has been produced under domestication; I believe that a small.
... many foxes—inhabiting the different quarters of the world. I do notbelieve, asweshall presently see,thatthe whole amount of difference between the several breeds of the dog has been produced under domestication; I believe that a small.
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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