 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...  The Darwinian Theory of the Transmutation of Species - Page 52by Robert Mackenzie Beverley - 1867 - 386 pagesFull view - About this book
 | Charles Darwin - 1912 - 776 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...instincts do vary ever so little, then I can see no difliculty in natural selection preserving and continually accumulating variations of instinct to any... | |
 | Emil Carl Wilm - Instinct - 1925 - 224 pages
...History of 10 Cf. the following more recent accounts of instinct : "If it can be shown that instincts vary ever so little, then I can see no difficulty...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated." (Darwin.) "Instinct... | |
 | Carl John Warden - Psychology, Comparative - 1927 - 104 pages
...accumulation of favorable variations in the struggle of the organism to survive. "If it can be shown (he says) that instincts do vary ever so little, then I can...accumulating variations of instinct to any extent profitable. It is thus, I believe, that all the most wonderful and complex instincts have originated."... | |
 | Charles Darwin - History - 2003 - 676 pages
...important as corporeal structure for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...accumulating variations of instinct to any extent that may be profitable. It is thus, as I believe, that all the most complex and wonderful instincts have... | |
 | Hans Siggaard Jensen, Lykke Margot Richter, Morten Thanning Vendel_ - Technology & Engineering - 2003 - 242 pages
...could become inherited. On the other hand, there was the possibility of natural selection of instinct: Under changed conditions of life, it is at least possible...accumulating variations of instinct to any extent that may be profitable. (Darwin [1859] 1985, p. 236) The second difficulty relates to the ontological conflation... | |
 | Glyn Lloyd-Hughes - 2005 - 412 pages
...changed conditions of life, it is at least possible that slightly changed instincts might be profitable; and if it can be shown that instincts do vary ever...no difficulty in natural selection preserving and accumulating their variations. But, as with corporeal structures, we ought to find in nature, not the... | |
 | Sir Norman Lockyer - Electronic journals - 1882 - 720 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...complex and wonderful instincts have originated." Briefly, then, in Mr. Darwin's view instincts may arise by lapsing intelligence, by natural selection... | |
 | Natural history - 1898 - 476 pages
...Bulletin No. 2. Scientific Series No 1. 1898. IN discussing the problem of Instinct, Darwin wrote, "If it can be shown that instincts do vary ever so...variations of instinct to any extent that was profitable." This sentence might well serve as the text for the charming book before us, and seems to have been... | |
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