Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 10
... progenitors to different conditions , or from their having intercrossed with individuals thus exposed ; or , lastly , from what we call in our ignorance spontaneous variation . He therefore who wishes to pair closely related animals ...
... progenitors to different conditions , or from their having intercrossed with individuals thus exposed ; or , lastly , from what we call in our ignorance spontaneous variation . He therefore who wishes to pair closely related animals ...
Стр. 12
... progenitors , having had their sexual elements somewhat differentiated , so that the embyro is benefited in the same manner as is a mature plant or animal by a slight change in its condi- tions of life , although in a much higher degree ...
... progenitors , having had their sexual elements somewhat differentiated , so that the embyro is benefited in the same manner as is a mature plant or animal by a slight change in its condi- tions of life , although in a much higher degree ...
Стр. 13
... progenitors have been subjected to very different conditions , have an immense advantage in height , weight , constitutional vigor and fertility over the self- fertilized offspring from one of the same parents . And this fact is amply ...
... progenitors have been subjected to very different conditions , have an immense advantage in height , weight , constitutional vigor and fertility over the self- fertilized offspring from one of the same parents . And this fact is amply ...
Стр. 45
... progenitors of the worms which act in the described manner . Nor are their actions so unvarying or inevitable as are most true instincts . As worms are not guided by special instincts in each. THE PART PLAYED BY WORMS . 45 Intelligence ...
... progenitors of the worms which act in the described manner . Nor are their actions so unvarying or inevitable as are most true instincts . As worms are not guided by special instincts in each. THE PART PLAYED BY WORMS . 45 Intelligence ...
Стр. 50
... progenitor of the ostrich genus had habits like those of the bustard , and that , as the size and weight of its body were increased during successive generations , its legs were used more , and its wings less , until they be- came ...
... progenitor of the ostrich genus had habits like those of the bustard , and that , as the size and weight of its body were increased during successive generations , its legs were used more , and its wings less , until they be- came ...
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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