The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538ÆäÀÌÁö |
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... 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 of ...
... 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 of ...
211 ÆäÀÌÁö
... 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 ...
292 ÆäÀÌÁö
... advantage or indirectly give any advantage to the other individuals of the same variety , thus leading to their preser- vation . But it would be superfluous to discuss this question in detail ; for with plants we have conclusive ...
... advantage or indirectly give any advantage to the other individuals of the same variety , thus leading to their preser- vation . But it would be superfluous to discuss this question in detail ; for with plants we have conclusive ...
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adapted admit affinities allied species America ancient appear Asa Gray 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 gilt top Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamell©¡ larv©¡ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive suppose tend theory tion variability variations varieties vary whole widely different wings young