Darwinism Stated by Darwin Himself: Characteristic Passages from the Writings of Charles DarwinD. Appleton, 1884 - 351 من الصفحات |
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الصفحة 2
... various kinds of movement which they display in manifest relation to their wants . The most different organs - stems , branches , flower - peduncles , petioles , mid- ribs of the leaf and leaflets , and apparently aërial roots— all ...
... various kinds of movement which they display in manifest relation to their wants . The most different organs - stems , branches , flower - peduncles , petioles , mid- ribs of the leaf and leaflets , and apparently aërial roots— all ...
الصفحة 4
... various movements are effected , there can be little doubt , from the researches of Sachs and H. de Vries , that they are due to unequal growth ; but , from the reasons already assigned , I can not believe that this explanation applies ...
... various movements are effected , there can be little doubt , from the researches of Sachs and H. de Vries , that they are due to unequal growth ; but , from the reasons already assigned , I can not believe that this explanation applies ...
الصفحة 22
... various ways , would create an endless di- versity of co - adapted structures in the several parts of the flower for the same general purpose . This view affords , I believe , the key which partly solves the prob- lem of the vast ...
... various ways , would create an endless di- versity of co - adapted structures in the several parts of the flower for the same general purpose . This view affords , I believe , the key which partly solves the prob- lem of the vast ...
الصفحة 31
... various organic bodies than over inorganic bodies , such as bits of glass , cin- der , wood , etc. , it becomes an interesting inquiry whether they can only absorb matter already in solution , or ren- der it soluble ; that is , have the ...
... various organic bodies than over inorganic bodies , such as bits of glass , cin- der , wood , etc. , it becomes an interesting inquiry whether they can only absorb matter already in solution , or ren- der it soluble ; that is , have the ...
الصفحة 33
... various objects , and never failed to find it acid . We may , therefore , conclude that the secretion from unex- cited leaves , though extremely viscid , is not acid or only slightly so , but that it becomes acid , or much more strongly ...
... various objects , and never failed to find it acid . We may , therefore , conclude that the secretion from unex- cited leaves , though extremely viscid , is not acid or only slightly so , but that it becomes acid , or much more strongly ...
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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.