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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Charles Darwin. or how a simple being or a simple organ can be changed and perfected into a highly developed being or into an elaborately constructed organ; secondly the subject ofinstinct, or the mental powers of animals; thirdly ...
Charles Darwin. or how a simple being or a simple organ can be changed and perfected into a highly developed being or into an elaborately constructed organ; secondly the subject ofinstinct, or the mental powers of animals; thirdly ...
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... organs. Withrespectto whatI havecalled the indirect actionof changedconditions, namely,through the reproductive systemof being affected, we may infer that variability is thus induced, partly from the fact of this system being extremely ...
... organs. Withrespectto whatI havecalled the indirect actionof changedconditions, namely,through the reproductive systemof being affected, we may infer that variability is thus induced, partly from the fact of this system being extremely ...
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... organs 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.
... organs 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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... organs inother countries, isprobably another instance of the effects ofuse. Notoneof ourdomesticanimals can benamed which has notin some country drooping ears;and the view which has been suggested that the drooping is dueto disuse of ...
... organs inother countries, isprobably another instance of the effects ofuse. Notoneof ourdomesticanimals can benamed which has notin some country drooping ears;and the view which has been suggested that the drooping is dueto disuse of ...
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... organs. Man canhardly select, or only with much difficulty, any deviation of structure excepting such as is externally visible; and indeed he rarely cares for whatisinternal. He can never actbyselection, excepting on variations which ...
... organs. Man canhardly select, or only with much difficulty, any deviation of structure excepting such as is externally visible; and indeed he rarely cares for whatisinternal. He can never actbyselection, excepting on variations which ...
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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