Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1890 - Всего страниц: 351 |
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Стр. 22
... continually augmented by selection ; thus the pedicel , as far as its action is concerned , would be modified in the same manner as if it had been short- ened . Such processes carried on during many thousand generations in various ways ...
... continually augmented by selection ; thus the pedicel , as far as its action is concerned , would be modified in the same manner as if it had been short- ened . Such processes carried on during many thousand generations in various ways ...
Стр. 40
... continually exposed to the action of the carbonic acid in the soil , and of the humus - acids which appear to be still more efficient in the decomposition of rocks . The generation of the humus - acids is probably hastened during the ...
... continually exposed to the action of the carbonic acid in the soil , and of the humus - acids which appear to be still more efficient in the decomposition of rocks . The generation of the humus - acids is probably hastened during the ...
Стр. 42
... continually moving down each side of every valley , and will in time reach its bed . Finally , this earth will be transported by the streams flowing in the valleys into the ocean , the great receptacle for all matter denuded from the ...
... continually moving down each side of every valley , and will in time reach its bed . Finally , this earth will be transported by the streams flowing in the valleys into the ocean , the great receptacle for all matter denuded from the ...
Стр. 71
... continually inducing fresh varia- bility . We have seen that when the seeds of pears , plums , apples , etc. , are sown , the seedlings generally inherit some degree of family likeness . Mingled with these seedlings , a few , and ...
... continually inducing fresh varia- bility . We have seen that when the seeds of pears , plums , apples , etc. , are sown , the seedlings generally inherit some degree of family likeness . Mingled with these seedlings , a few , and ...
Стр. 88
... continually recur- ring with varying success ; and yet in the long run the forces are so nicely balanced that the face of Nature re- mains for long periods of time uniform , though assuredly the merest trifle would give the victory to ...
... continually recur- ring with varying success ; and yet in the long run the forces are so nicely balanced that the face of Nature re- mains for long periods of time uniform , though assuredly the merest trifle would give the victory to ...
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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