 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 70by Robert Mackenzie Beverley - 1867 - 386 pagesFull view - About this book
 | Jacob Gould Schurman - Ethics, Evolutionary - 1903 - 292 pages
...describes his position in these words : " If it can be shown that instincts do vary ever so little, then I can see no difficulty in Natural Selection preserving...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated." Here, as always,... | |
 | David Syme - Instinct - 1903 - 280 pages
...might be profitable to a species, and if it can be shown these instincts vary ever so little, then I can see no difficulty in natural selection preserving and continually accumulating variations of instincts to any extent that was profitable. It is thus, as I believe, that all the complex and wonderful... | |
 | Charles Darwin - Evolution - 1909 - 584 pages
...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...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated. As modifications of... | |
 | Samuel Jackson Holmes - 1911 - 318 pages
...its present conditions of life. . . . If it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated." — DARWIN, Origin... | |
 | Charles Darwin - 1912 - 776 pages
...species; and if it can be shown that instincts do vary ever so little, then I can see no difliculty in natural selection preserving and continually accumulating...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated. As modifications of... | |
 | Encyclopedias and dictionaries - 1913 - 876 pages
...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...instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated." (Op. cit., New York,... | |
 | Emil Carl Wilm - Instinct - 1925 - 224 pages
...following more recent accounts of instinct : "If it can be shown that instincts vary ever so little, then I can see no difficulty in natural selection preserving...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 - 106 pages
...the organism to survive. "If it can be shown (he says) that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...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
...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...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... | |
| |
