Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 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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Darwinism Stated by Darwin Himself: Characteristic Passages from the ... Charles Darwin Полный просмотр - 1884 |
Darwinism Stated by Darwin Himself: Characteristic Passages from the ... Charles Darwin Полный просмотр - 1890 |
Darwinism stated by Darwin himself: Characteristic passages from the ... Charles Darwin Ограниченный просмотр - 2023 |
Часто встречающиеся слова и выражения
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
Популярные отрывки
Стр. i - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Стр. 347 - It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent upon each other in so complex a manner, have all been produced by laws acting around us.
Стр. 110 - To suppose that the eye, with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest possible degree.
Стр. 72 - The key is man's power of accumulative selection: nature gives successive variations; man adds them up in certain directions useful to him. In this sense he may be said to have made for himself useful breeds.
Стр. 254 - It is incredible that all these facts should speak falsely. He who is not content to look, like a savage, at the phenomena of nature as disconnected, cannot any longer believe that man is the work of a separate act of creation.
Стр. 44 - It may be doubted whether there are many other animals which have played so important a part in the history of the world, as have these lowly organised creatures.
Стр. 308 - But as my conclusions have lately been much misrepresented, and it has been stated that I attribute the modification of species exclusively to natural selection, I may be permitted to remark that in the first edition of this work, and subsequently, I placed in a most conspicuous position — namely, at the close of the Introduction — the following words: "I am convinced that natural selection has been the main but not thé exclusive means of modification.