Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 351 من الصفحات |
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الصفحة viii
... kind . ' Science tells the same story . But what is the limit of the fixedness of the law ? I believe that the evolution of new species is a question in science , and not of religion . It should be left to scientific men . " -President ...
... kind . ' Science tells the same story . But what is the limit of the fixedness of the law ? I believe that the evolution of new species is a question in science , and not of religion . It should be left to scientific men . " -President ...
الصفحة 8
... , dry or moist place , or from a different kind of soil containing other organic seeds or inorganic matter . THE STRUGGLE FOR EXISTENCE AMONG SEEDS . Seeds often lie 8 DARWINISM STATED BY DARWIN HIMSELF . Experiments in Crossing.
... , dry or moist place , or from a different kind of soil containing other organic seeds or inorganic matter . THE STRUGGLE FOR EXISTENCE AMONG SEEDS . Seeds often lie 8 DARWINISM STATED BY DARWIN HIMSELF . Experiments in Crossing.
الصفحة 9
... kind grow with great vigor , and trans- mit their vigor to their descendants . These , therefore , in the struggle for life , will generally beat and exterminate the seedlings from plants which have long grown near together under the ...
... kind grow with great vigor , and trans- mit their vigor to their descendants . These , therefore , in the struggle for life , will generally beat and exterminate the seedlings from plants which have long grown near together under the ...
الصفحة 11
... kind . For instance , plants of Ipomoea thus crossed were to the intercrossed plants of the same stock , with which they grew in competition , as 100 to 78 in height , and as 100 to 51 in fertility ; and plants of Eschscholtzia ...
... kind . For instance , plants of Ipomoea thus crossed were to the intercrossed plants of the same stock , with which they grew in competition , as 100 to 78 in height , and as 100 to 51 in fertility ; and plants of Eschscholtzia ...
الصفحة 17
... kind of union is inefficient , like that between distinct species . Another and still more remark- able incidental result is that the seedlings from an ille- gitimate union are often dwarfed and more or less com- pletely barren , like ...
... kind of union is inefficient , like that between distinct species . Another and still more remark- able incidental result is that the seedlings from an ille- gitimate union are often dwarfed and more or less com- pletely barren , like ...
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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 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
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.