 | 1902 - Страниц: 874
...natural selection of numerous successive, slight, favorable variations; aided In an important manner Ъу the inherited effects of the use and disuse of parts;...seem to us in our ignorance to arise spontaneously. It appears that I formerly underrated the frequency and value of these latter forms of variation, as... | |
 | 1876 - Страниц: 828
...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... | |
 | 1909 - Страниц: 846
...the use and disuse of parts, and in an important manner, that is in relation to adaptive structure, whether past or present, by the direct action of external...seem to us in our ignorance to arise spontaneously. It appears that I formerly underrated the frequency and value of these latter forms of variation, as... | |
 | 1909 - Страниц: 838
...the use and disuse of parts, and in an important manner, that is in relation to adaptive structure, whether 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 I formerly underrated the... | |
 | Nicholas Patrick Wiseman - 1872 - Страниц: 542
...distinctly admits that his opinions have somewhat changed since his first edition. " Species," he says, " have been modified during a long course of descent....seem to us in our ignorance to arise spontaneously. It appears that I formerly underrated the frequency and value of these latter forms of variation, as... | |
 | Charles Darwin - 1875 - Страниц: 504
...species have been modified, during a long course of descent. This has been effected chiefly through tho natural selection of numerous successive, slight,...seem to us in our ignorance to arise spontaneously. It appears that I formerly underrated the frequency and value of these latter forms of variation, as... | |
 | American Association for the Advancement of Science - 1875 - Страниц: 392
...it has been effected "chiefly through the natural selection of numerous successive slight favorable variations, aided in an important manner by the inherited...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 - Страниц: 390
...it has been effected "chiefly through the natural selection of numerous successive slight favorable variations, aided in an important manner by the inherited...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 - Страниц: 554
...emphatic declaration as given in the sixth edition of the Origin. ' I have now recapitulated,' he says, 'the facts and considerations which have thoroughly...seem to us in our ignorance to arise spontaneously. It appears that I formerly underrated the frequency and value of these latter forms of variation, as... | |
 | 1876 - Страниц: 898
...This has been effected chiefly through the natural selection of numerous successive, slight, favorable variations ; aided in an important manner by the inherited...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... | |
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I have now recapitulated the facts and considerations which have thoroughly convinced me that species have been modified during a long course of descent. This has been effected chiefly through the natural selection of numerous successive, slight, favourable... 
