The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life: Reprinted from the Sixth London Edition, with All Additions and CorrectionsA. L. Burt Company, 1890 - 538페이지 |
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72 페이지
... advantage over a different set of competitors or enemies . • It is good thus to try in imagination to give any one species an advantage over another . Probably in no single instance should we know what to do . This ought to convince us ...
... advantage over a different set of competitors or enemies . • It is good thus to try in imagination to give any one species an advantage over another . Probably in no single instance should we know what to do . This ought to convince us ...
115 페이지
... advantage ; and the largeness of any group shows that its species have inherited from a common ancestor some advantage in common . Hence , the struggle for the pro- duction of new and modified descendants will mainly lie between the ...
... advantage ; and the largeness of any group shows that its species have inherited from a common ancestor some advantage in common . Hence , the struggle for the pro- duction of new and modified descendants will mainly lie between the ...
211 페이지
... advantage , but by the union of all . great and small . Mr. Mivart then asks ( and this is his second objection ) , if natural selection be so potent , and if high browsing be so great an advantage , why has not any other hoofed quad ...
... advantage , but by the union of all . great and small . Mr. Mivart then asks ( and this is his second objection ) , if natural selection be so potent , and if high browsing be so great an advantage , why has not any other hoofed quad ...
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adapted admit affinities ALEXANDRE DUMAS allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs paleozoic parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds Silurian SIR WALTER SCOTT slight South America stamens sterility structure successive suppose tend theory tion trees variability variations varieties vary whole widely different wings young