Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 351 من الصفحات |
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الصفحة iv
... probably be a long while before the dispute over the theory that he advocated will cease , but there is certainly no excuse for a difference of opinion with regard to the language that he used , and the meaning he attached to it . That ...
... probably be a long while before the dispute over the theory that he advocated will cease , but there is certainly no excuse for a difference of opinion with regard to the language that he used , and the meaning he attached to it . That ...
الصفحة 7
... probably connected with some corresponding , though often quite imperceptible , change in structure or compo- sition . Whatever affects an organism in any way , likewise tends to act on its sexual elements . We see this in the ...
... probably connected with some corresponding , though often quite imperceptible , change in structure or compo- sition . Whatever affects an organism in any way , likewise tends to act on its sexual elements . We see this in the ...
الصفحة 9
... 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 . Seeds , moreover , which were matured during different ...
... 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 . Seeds , moreover , which were matured during different ...
الصفحة 10
... probably is with animals from too close interbreeding . The effects of close interbreeding on animals , judging again from plants , would be deterioration in general vigor , including fertility , with no necessary loss of excellence of ...
... probably is with animals from too close interbreeding . The effects of close interbreeding on animals , judging again from plants , would be deterioration in general vigor , including fertility , with no necessary loss of excellence of ...
الصفحة 12
... probably in hermaph- rodite animals , are special adaptations for securing an occasional cross between two individuals ; and that the advantages from such a cross depend altogether on the beings which are united , or their progenitors ...
... probably in hermaph- rodite animals , are special adaptations for securing an occasional cross between two individuals ; and that the advantages from such a cross depend altogether on the beings which are united , or their progenitors ...
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
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 increase individuals inhabitants inherited insects instance intermediate islands kind labellum lancelet language larvæ laws 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
مقاطع مشهورة
الصفحة 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.
الصفحة 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.
الصفحة 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.
الصفحة 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.
الصفحة 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.
الصفحة 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.
الصفحة 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.