Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 10
... variation . He therefore who wishes to pair closely related animals ought to keep them under conditions as different as possible . As some kinds of plants suffer much more Page 459 . from self - fertilization than do others , so it ...
... variation . He therefore who wishes to pair closely related animals ought to keep them under conditions as different as possible . As some kinds of plants suffer much more Page 459 . from self - fertilization than do others , so it ...
Стр. 21
... variations in any one part were preserved from being beneficial to the plant , then the other parts would generally have to be modified in some corresponding manner . But these latter parts might not vary at all , or they might not vary ...
... variations in any one part were preserved from being beneficial to the plant , then the other parts would generally have to be modified in some corresponding manner . But these latter parts might not vary at all , or they might not vary ...
Стр. 22
... variations , until the flower was turned com- pletely round on its axis . This seems to have actually occurred with Malaxis paludosa , for the labellum has ac- quired its present upward position by the ovarium being twisted twice as ...
... variations , until the flower was turned com- pletely round on its axis . This seems to have actually occurred with Malaxis paludosa , for the labellum has ac- quired its present upward position by the ovarium being twisted twice as ...
Стр. 23
... variations which were beneficial to the organism under complex and ever - varying conditions of life , tran- scend in an incomparable manner the contrivances and adaptations which the most fertile imagination of man . could invent . The ...
... variations which were beneficial to the organism under complex and ever - varying conditions of life , tran- scend in an incomparable manner the contrivances and adaptations which the most fertile imagination of man . could invent . The ...
Стр. 45
... variations of some other habit ; and in this case the new habit will have been acquired independently of intelligence throughout the whole course of its devel- opment . There is no a priori improbability in worms having acquired special ...
... variations of some other habit ; and in this case the new habit will have been acquired independently of intelligence throughout the whole course of its devel- opment . There is no a priori improbability in worms having acquired special ...
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Darwinism Stated by Darwin Himself: Characteristic Passages from the ... Charles Darwin Полный просмотр - 1884 |
Darwinism Stated by Darwin Himself: Characteristic Passages from the ... Charles Darwin Полный просмотр - 1884 |
Darwinism stated by Darwin himself: Characteristic passages from the ... Charles Darwin Ограниченный просмотр - 2023 |
Часто встречающиеся слова и выражения
acid acquired action adapted admit allied animals apes appear become believe birds body breeds cause character climate closely compared cotyledons crossed degree descended developed distinct species disuse domestic doubt early effects eggs embryo existence extinct eyes fact female fertilization forms gemmules genera genus geotropism Glacial habits hairs hermaphrodites highly horses increase individuals inhabitants inherited insects instance instincts islands kinds labellum lancelet larvæ leaves less living lower animals Malaxis paludosa males mammals manner mental millimetre modified monkeys movements muscles natural selection naturalists observed occasionally offspring organs Origin of Species ovules papillæ parent peculiar period pigeon plants points pollen pollinium possess present prey probably produced progenitors Quadrumana quadrupeds races radicles remarkable resemble rudimentary savages seedlings seeds seems sexes sexual elements sexual selection slight structure suppose surface tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young