... variations ; aided in an important manner by the inherited effects of the use and disuse of parts ; and in an unimportant manner, that is in relation to adaptive structures, whether past or present, by the direct action of external conditions, and... The Science-history of the Universe - Page 222edited by - 1909Full view - About this book
| Biology - 1909 - 838 pages
...past or present, by the direct action of external conditions, and by variations rvhich seem to us in our ignorance to arise spontaneously. It appears that...modifications of structure independently of natural selection, . . . He adds, in answer to certain recent criticisms that he placed at the end of the introduction... | |
| Charles Darwin - Evolution - 1882 - 492 pages
...past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...as leading to permanent modifications of structure inde|iendeutly of natural selection. But as my conclusions have lately been much misrepresented, and... | |
| Charles Darwin - Evolution - 1883 - 494 pages
...past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...misrepresented, and it has been stated that I attribute the modi6cation of species exclusively to natural selection, I may be permitted to remark that in the first... | |
| Charles Darwin - Evolution - 1889 - 368 pages
...past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...species exclusively to natural selection, I may be per-_ mitted to remark that in the first edition of this work, and subsequently, I placed in a most... | |
| George John Romanes - Evolution - 1895 - 434 pages
...variations, in which the nature of the conditions plays quite a subordinate part V Elsewhere he says, — " It appears that I formerly underrated the frequency...modifications of structure independently of natural selection V The " forms of variation " to which he here alludes are " variations which seem to us in our ignorance... | |
| George John Romanes - Evolution - 1895 - 380 pages
...variations, in which the nature of the conditions plays quite a subordinate part V Elsewhere he says, — " It appears that I formerly underrated the frequency...modifications of structure independently of natural teUciicn *." The " forms of variation " to which he here alludes are " variations which seem to us... | |
| Charles Darwin - Evolution - 1902 - 770 pages
...past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...natural selection, I may be permitted to remark that iu the first edition of this work, and subsequently, I placed in a most conspicuous position — namely,... | |
| Evolution (Biology) - 1902 - 200 pages
...past or present, by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...variation, as leading to permanent modifications of 18 structure independently of natural selection. But as my conclusions have lately been much misrepresented,... | |
| John Boyd Kinnear - Religion - 1905 - 228 pages
...past or present — by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...formerly underrated the frequency and value of these forms of variation, as leading to permanent modifications of structure independently of natural selection.'... | |
| Samuel Butler - Art criticism - 1908 - 364 pages
...past or present — by the direct action of external conditions, and by variations which seem to us in our ignorance to arise spontaneously. It appears that...of structure independently of natural selection." The "numerous, successive, slight, favourable variations " above referred to are intended to be fortuitous,... | |
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