Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - Всего страниц: 351 |
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Стр. 3
... 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 temporary ...
... 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 temporary ...
Стр. 5
... slight momentary touch . The habit of moving at certain pe- riods is inherited both by plants and animals ; and several other points of similitude have been specified . But the most striking resemblance is the localization of their ...
... slight momentary touch . The habit of moving at certain pe- riods is inherited both by plants and animals ; and several other points of similitude have been specified . But the most striking resemblance is the localization of their ...
Стр. 12
... slight change in its condi- tions of life , although in a much higher degree . Another and more important result may be deduced from my observations . Eggs and seeds are highly ser- viceable as a means of dissemination , but we now know ...
... slight change in its condi- tions of life , although in a much higher degree . Another and more important result may be deduced from my observations . Eggs and seeds are highly ser- viceable as a means of dissemination , but we now know ...
Стр. 19
... slight increase in length and decrease in its thickness , and by the anther opening a little more widely , becomes specially adapted for the very different purpose of self - fertilization , through the combined aid of THE MOVEMENTS AND ...
... slight increase in length and decrease in its thickness , and by the anther opening a little more widely , becomes specially adapted for the very different purpose of self - fertilization , through the combined aid of THE MOVEMENTS AND ...
Стр. 20
... slight modification , the elasticity of the pedicel becomes specially adapted to shoot out the pollinium with considerable force , so as to strike the body of the visiting insect . The great cavity in the labellum of many Vandeæ is ...
... slight modification , the elasticity of the pedicel becomes specially adapted to shoot out the pollinium with considerable force , so as to strike the body of the visiting insect . The great cavity in the labellum of many Vandeæ is ...
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acquired action admit allied apes appear Asa Gray become believe birds blush body breeds Catarrhine cause characters closely Cloth Darwin degree descended developed distinct species domestic doubt early effects eggs existence expression extinct eyes fact favorable feel females fertilization forms gemmules genera geotropism habit hair HERBERT SPENCER hermaphrodites highly horse Illustrations increase individuals inhabitants inherited insects instance intermediate islands kind labellum lancelet language larvæ less living lower animals males mammals manner ment mental mind modified monkeys movements muscles natural selection naturalists observed offspring organic Origin of Species papillæ parent peculiar period plants pollen possess present principle probably produced Professor progenitors Quadrumana quadrupeds races remarkable resemble rudimentary savages seeds seems seen sexes sexual selection slight South America structure suppose T. H. HUXLEY tend tendency tion transmitted utricle variability variations varieties various vertebræ whole wild worms young