Darwinism and Lamarckism, Old and New: Four LecturesDuckworth, 1899 - 169 стор. |
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Сторінка 32
... sterility between different species was a provision intended from the begin- ning to prevent confusion between all kinds of plants and animals . It is now known that the assumption of sterility between individuals of different species ...
... sterility between different species was a provision intended from the begin- ning to prevent confusion between all kinds of plants and animals . It is now known that the assumption of sterility between individuals of different species ...
Сторінка 53
... sterility of hybrids ; and even that had broken down before the records of the numerous zoological and botanical gardens . No- thing could be done except to cover the retreat by raising a cloud of futile objections ; and these soon ...
... sterility of hybrids ; and even that had broken down before the records of the numerous zoological and botanical gardens . No- thing could be done except to cover the retreat by raising a cloud of futile objections ; and these soon ...
Сторінка 100
... sterility must have commenced before the two forms could have been produced , and , there- fore , before there were any mongrels . In other words , certain individuals must have been more or less physiologically isolated from each other ...
... sterility must have commenced before the two forms could have been produced , and , there- fore , before there were any mongrels . In other words , certain individuals must have been more or less physiologically isolated from each other ...
Сторінка 102
... sterility be- tween individuals of different species . So far as our present experience goes , it seems that com- plete fertility between individuals of different species is rare , and that nearly all are absolutely infertile . No ...
... sterility be- tween individuals of different species . So far as our present experience goes , it seems that com- plete fertility between individuals of different species is rare , and that nearly all are absolutely infertile . No ...
Сторінка 103
... sterility between species was not absolute , as had previously been supposed ; and therefore it was not a fatal objection to the theory of the development of species . But although he did this he failed to give any satisfactory explana ...
... sterility between species was not absolute , as had previously been supposed ; and therefore it was not a fatal objection to the theory of the development of species . But although he did this he failed to give any satisfactory explana ...
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Darwinism and Lamarckism, Old and New: Four Lectures Frederick Wollaston Hutton Повний перегляд - 1899 |
Darwinism and Lamarckism, Old and New: Four Lectures Frederick Wollaston Hutton Повний перегляд - 1899 |
Darwinism and Lamarckism Old and New Frederick Wollaston Hutton Попередній перегляд недоступний - 2014 |
Загальні терміни та фрази
acquired characters action of external action of natural action of selection adapted animals and plants arise artificial selection become biology birds called cause cells Chatham Island colour congenital consequently Darwin definite variation despotism different species direct action divergent evolution domesticated doubt earth environment evidence explain external conditions extrinsic selection facts fancy pigeons favour fertile flatfish flowers gemmules genera genus germ-cells groups Herbert Spencer hypothesis idea important indefinite infertility inheritance insects island kinetogenesis Lamarck Lamarckians large number lecture living means mental variations modification Moritz Wagner natural selection naturalists Neo-Lamarckians North Island notochord number of individuals offspring opinion organic evolution organisation Origin of Species Pangenesis physical isolation physiological isolation plants and animals post-natal present principle of selection produced Professor progress Radiolarians reason recognition-marks says science of history structure struggle for existence suppose take place theory tion transmitted use-inheritance varieties vary vertebræ Zealand