The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for LifeD. Appleton, 1904 - 435페이지 |
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v 페이지
... Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of domestic varieties ...
... Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of domestic varieties ...
vi 페이지
... caused by Natural Se- lection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
... caused by Natural Se- lection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
xi 페이지
... causes of sterility of hybrids , added to and corrected . Pyrgoma found in the chalk . Extinct forms serving to connect existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of ...
... causes of sterility of hybrids , added to and corrected . Pyrgoma found in the chalk . Extinct forms serving to connect existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of ...
xv 페이지
... cause of change . He was cautious in drawing conclusions , and did not believe . that existing species are now undergoing modification ; and , as his son adds , " C'est donc un problème à réserver entièrement à l'avenir , supposé même ...
... cause of change . He was cautious in drawing conclusions , and did not believe . that existing species are now undergoing modification ; and , as his son adds , " C'est donc un problème à réserver entièrement à l'avenir , supposé même ...
xx 페이지
... causes the orderly succession and progression of such organic phenomena may have been committed , we , as yet , are ... Cause . " If we interpret these sentences given in the same Address , one by the other , it appears that this ...
... causes the orderly succession and progression of such organic phenomena may have been committed , we , as yet , are ... Cause . " If we interpret these sentences given in the same Address , one by the other , it appears that this ...
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adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised 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 kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young