On Germinal Selection As a Source of Definite Variation
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In our eReader you can find the full English version of the book. Read On Germinal Selection As a Source of Definite Variation Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book On Germinal Selection As a Source of Definite Variation
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Hence, as I before remarked at page 31, I see no reason for assuming two kinds of hereditary variations, distinct as to their origin, sudi as Scott and the other palaeontologists mentioned have been led to adopt, al- though with the utmost caution. I beUeve there is OTily_ one Jdnd^f variation proceeding from the germ, and that these germinal variations play quite different roles according as they he or do not lie on the pafli of adaptive transformation of the species, and conse- quently are or... are not favored by germinal selection.
To repeat what I have said in the footnote to page 31 only a relatively small portion of the numberless in- dividual variations he on the path of phyletic ad- vancement and so mark out under the guidance of germinal selection the way of further development; and hence it would be quite possible to distinguish continuous, definitely directed variations from such as fluctuate hither and thither with no uniformity in the course of generations. The ori^ of the two is the same ; they bear in them nothing that distinguishes the one from the other, and their success alone, that APPENDIX.
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To quickly assess the difficulty of the text, read a short excerpt:
Hence, as I before remarked at page 31, I see no reason for assuming two kinds of hereditary variations, distinct as to their origin, sudi as Scott and the other palaeontologists mentioned have been led to adopt, al- though with the utmost caution. I beUeve there is OTily_ one Jdnd^f variation proceeding from the germ, and that these germinal variations play quite different roles according as they he or do not lie on the pafli of adaptive transformation of the species, and conse- quently are or... are not favored by germinal selection.
To repeat what I have said in the footnote to page 31 only a relatively small portion of the numberless in- dividual variations he on the path of phyletic ad- vancement and so mark out under the guidance of germinal selection the way of further development; and hence it would be quite possible to distinguish continuous, definitely directed variations from such as fluctuate hither and thither with no uniformity in the course of generations. The ori^ of the two is the same ; they bear in them nothing that distinguishes the one from the other, and their success alone, that APPENDIX.
What to read after On Germinal Selection As a Source of Definite Variation?
You can find similar books in the "Read Also" column, or choose other free books by Weismann, August, 1834-1914 to read onlineMoreLess
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