Under changed conditions of life, it is at least possible that slight modifications of instinct might be profitable to a species; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving... On the Origin of Species by Means of Natural Selection: Or, The Preservation ... - 187 페이지 저자: Charles Darwin - 1864 - 440 페이지 전체보기 -
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