Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 9
... surface by any means , as by burrowing ani- mals . They would probably be affected by the mere cir- cumstance of having long lain dormant ; for gardeners believe that the production of double flowers , and of fruit , is thus influenced ...
... surface by any means , as by burrowing ani- mals . They would probably be affected by the mere cir- cumstance of having long lain dormant ; for gardeners believe that the production of double flowers , and of fruit , is thus influenced ...
Стр. 25
... surface is directed downward , while the lower sur- face is fully exposed to the sky ; and an arched roof is thus formed over the two lateral leaflets , which have their upper surfaces pressed closely together . Here we have the unusual ...
... surface is directed downward , while the lower sur- face is fully exposed to the sky ; and an arched roof is thus formed over the two lateral leaflets , which have their upper surfaces pressed closely together . Here we have the unusual ...
Стр. 26
... surfaces from being chilled at night by radiation . There is nothing improb- able in the upper surface needing protection more than the lower , as the two differ in function and structure . All gardeners know that plants suffer from ...
... surfaces from being chilled at night by radiation . There is nothing improb- able in the upper surface needing protection more than the lower , as the two differ in function and structure . All gardeners know that plants suffer from ...
Стр. 27
... surfaces ; for , although the tem- perature of their upper surfaces would undoubtedly fall when freely exposed to a clear sky , yet we thought that they would so quickly acquire by conduction the temper- ature of the surrounding air ...
... surfaces ; for , although the tem- perature of their upper surfaces would undoubtedly fall when freely exposed to a clear sky , yet we thought that they would so quickly acquire by conduction the temper- ature of the surrounding air ...
Стр. 36
... surfaces of the utricle ; and a few , according to Warming may be found in the upper part . This upper region is cov- ered by many transverse rows , one above the other , of short , closely approximate hairs , pointing downward . These ...
... surfaces of the utricle ; and a few , according to Warming may be found in the upper part . This upper region is cov- ered by many transverse rows , one above the other , of short , closely approximate hairs , pointing downward . These ...
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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