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31개의 결과 중 1 - 5개
31 페이지
... region . Dr. Hooker doubts if there is a true re- version in the case of plants . Mr. Darwin's observa- tions rather favor it in the animal kingdom . With mingled races reversion seems well made out in the case of pigeons . The common ...
... region . Dr. Hooker doubts if there is a true re- version in the case of plants . Mr. Darwin's observa- tions rather favor it in the animal kingdom . With mingled races reversion seems well made out in the case of pigeons . The common ...
40 페이지
... region to a dry , we invariably see some species gradually getting rarer and rarer , and finally disappearing ; and , the change of climate being conspicuous , we are tempted to at- tribute the whole effect to its direct action . But ...
... region to a dry , we invariably see some species gradually getting rarer and rarer , and finally disappearing ; and , the change of climate being conspicuous , we are tempted to at- tribute the whole effect to its direct action . But ...
41 페이지
Asa Gray. southward or in descending a mountain . When we reach the arctic regions , or snow - capped summits , or absolute deserts , the struggle for life is almost exclusively with the elements . " That climate acts in main part ...
Asa Gray. southward or in descending a mountain . When we reach the arctic regions , or snow - capped summits , or absolute deserts , the struggle for life is almost exclusively with the elements . " That climate acts in main part ...
75 페이지
... region of the formation of a new individual , in some unknown part of which , and in some wholly unknown way , the difference is intercalated . To introduce necessity here is gratuitous and unscientific ; but here you must have it to ...
... region of the formation of a new individual , in some unknown part of which , and in some wholly unknown way , the difference is intercalated . To introduce necessity here is gratuitous and unscientific ; but here you must have it to ...
76 페이지
... region , but not till then . But the whole course of scientific dis- covery goes to assure us that the discovery of the cause of variation will be only a resolution of varia- tion into two factors : one , the immediate secondary cause ...
... region , but not till then . But the whole course of scientific dis- covery goes to assure us that the discovery of the cause of variation will be only a resolution of varia- tion into two factors : one , the immediate secondary cause ...
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adaptation Agassiz appears argument atheistic auroch botanists Candolle Cloth common conclusion connection creation Darwin Darwin's theory Darwinian derivation descendants design in Nature direct divine doctrine doubt Drosera dysteleology equally evidence of design evolution existence explain extinct facts favor final causes force forms fossil genera geological glands Glyptostrobus gradation ground Hodge human hypothesis idea illustration individuals inference insects instance laws less living matter means ment mind miocene natural history natural selection natural theology naturalists nebular hypothesis object origin of species particular peculiar perhaps philosophical phyllotaxis physical plants and animals pollen present principle probably produced Prof propagated prove purpose question races reason regard remarks Review Sarracenia scientific seems sense Sequoia sexual reproduction sort structure succession suggest suppose Taxodium teleology tentacles tertiary theistic things thought tion tive trees variation varieties vary vegetable Westminster Reviewer whole
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131 페이지 - And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
3 페이지 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
38 페이지 - There is no exception to the rule that every organic being naturally increases at so high a rate, that if not destroyed, the earth would soon be covered by the progeny of a single pair.
6 페이지 - ROBERTSON, The late Rev. FW, MA—TM& and Letters of. Edited by the Rev. Stopford Brooke, MA I. Two vols., uniform with the Sermons. With Steel Portrait. Crown 8vo, "js.
6 페이지 - Essays on Astronomy. A Series of Papers on Planets and Meteors, the Sun and Sun-surrounding Space, Stars and Star Cloudlets. By RA Proctor, BA With 10 Plates and 24 Woodcuts.
276 페이지 - My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.
18 페이지 - The green and budding twigs may represent existing species; and those produced during each former year may represent the long succession of extinct species. At each period of growth all the growing twigs have tried to branch out on all sides, and to overtop and kill the surrounding twigs and branches, in the same manner as species and groups of species have tried to overmaster other species in the great battle for life.
104 페이지 - I can entertain no doubt, after the most deliberate study and dispassionate judgment of which I am capable, that the view which most naturalists until recently entertained, and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable...
18 페이지 - Of the many twigs which flourished when the tree was a mere bush, only two or three, now grown into great branches, yet survive and bear the other branches; so with the species which lived during long-past geological periods, very few have left living and modified descendants.
40 페이지 - Climate plays an important part in determining the average numbers of a species, and periodical seasons of extreme cold or drought seem to be the most effective of all checks.