This has been effected chiefly through the natural selection of numerous successive, slight, favourable 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... The American Naturalist - Page 1701909Full view - About this book
| 1902 - 872 pages
...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...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
| 1876 - 828 pages
...unimportant manner — that is, in relation to adaptive structures, whether past or present — by tho direct action of external conditions, and by variations...seem to us, in our ignorance, to arise spontaneously. As my conclusions have lately been much misrepresented, and it has been stated that I attribute the... | |
| Charles Darwin - 1873 - 492 pages
...to adaptive structures, whether past or present, by the direct action of external conditions, and'by variations which seem to us in our ignorance to arise...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
| Charles Darwin - 1875 - 504 pages
...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...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
| American Association for the Advancement of Science - 1875 - 390 pages
...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...to us, in our ignorance, to arise spontaneously." ("Origin of Species," 6th edition, 1873, p. 421.) Recently the effect of local isolation has been sought... | |
| American Association for the Advancement of Science - 1875 - 392 pages
...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...to us, in our ignorance, to arise spontaneously." ("Origin of Species," 6th edition, 1873, p. 421.) Recently the effect of local isolation has been sought... | |
| 1903 - 554 pages
...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...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
| Arthur Cayley Headlam - 1882 - 524 pages
...estimate of its power. We now quote his words, premising that the variations to which he refers are those which ' seem to us in our ignorance to arise spontaneously...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
| 1876 - 898 pages
...and disuse of parts ; and in an unimportant manner — that is, in relation to adaptive structures, •whether past or present — by the direct action...seem to us, in our ignorance, to arise spontaneously. As my conclusions have lately been much misrepresented, and it has been stated that I attribute the... | |
| 1881 - 334 pages
...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...modifications of structure independently of natural selection. But as my conclusions have lately been much misrepresented, and it has been stated that I attribute... | |
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