 | 1902 - 874 lehte
...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 - 828 lehte
...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 - 846 lehte
...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 - 838 lehte
...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 - 542 lehte
...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 - 504 lehte
...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 - 392 lehte
...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 - 390 lehte
...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 - 554 lehte
...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 - 898 lehte
...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... 
