Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 3
... Extremely slight pressure often suffices . If the pressure be not permanent , the part in question straight- ens itself and is again ready to bend on being touched . 6. Tendrils , soon after clasping a support , but not after a mere ...
... Extremely slight pressure often suffices . If the pressure be not permanent , the part in question straight- ens itself and is again ready to bend on being touched . 6. Tendrils , soon after clasping a support , but not after a mere ...
Стр. 33
... extremely viscid , is not acid or only slightly so , but that it becomes acid , or much more strongly so , after the tentacles have begun to bend over any inorganic or organic object ; and still more strongly acid after the tentacles ...
... extremely viscid , is not acid or only slightly so , but that it becomes acid , or much more strongly so , after the tentacles have begun to bend over any inorganic or organic object ; and still more strongly acid after the tentacles ...
Стр. 42
... extremely long . THEY PRESERVE VALUABLE RUINS . Archæologists ought to be grateful to Page - 308 . worms , as they protect and preserve for an indefinitely long period every object , not liable to decay , which is dropped on the surface ...
... extremely long . THEY PRESERVE VALUABLE RUINS . Archæologists ought to be grateful to Page - 308 . worms , as they protect and preserve for an indefinitely long period every object , not liable to decay , which is dropped on the surface ...
Стр. 45
... extremely complicated movements and by the shortest course . With animals , actions appearing due to intelligence may be performed through inherited habit without any intelligence , although aboriginally thus acquired . Or the habit may ...
... extremely complicated movements and by the shortest course . With animals , actions appearing due to intelligence may be performed through inherited habit without any intelligence , although aboriginally thus acquired . Or the habit may ...
Стр. 56
... extremely improbable it allows nothing for variation ; it passes over the almost monstrous character of some of the breeds ; and it almost necessarily assumes that a large number of species have become extinct since man domes- ticated ...
... extremely improbable it allows nothing for variation ; it passes over the almost monstrous character of some of the breeds ; and it almost necessarily assumes that a large number of species have become extinct since man domes- ticated ...
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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