On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1888 - 458페이지 |
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vi 페이지
... descendants from a common parent - Explains the grouping of all organic beings Advance in organisation - Low forms preserved Convergence of character - Indefinite multiplication of species- Summary - .. - Page 62-105 CHAPTER V. LAWS OF ...
... descendants from a common parent - Explains the grouping of all organic beings Advance in organisation - Low forms preserved Convergence of character - Indefinite multiplication of species- Summary - .. - Page 62-105 CHAPTER V. LAWS OF ...
xiii 페이지
... descendants by true generation of pre - existing forms . Passing over allusions to the subject in the classical writers , * the first author who in modern times has treated it in a scientific spirit was Buffon . But as his opinions ...
... descendants by true generation of pre - existing forms . Passing over allusions to the subject in the classical writers , * the first author who in modern times has treated it in a scientific spirit was Buffon . But as his opinions ...
xx 페이지
... descendants through continued reproduction . " A well - known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espéce ...
... descendants through continued reproduction . " A well - known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espéce ...
4 페이지
... descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am convinced that Natural Selection has been the nos ...
... descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am convinced that Natural Selection has been the nos ...
12 페이지
... descendants of aborigi- nally distinct species , and by other competent judges as mere varieties . If any well marked distinction existed between a domestic race and a species , this source of doubt would not so perpetually recur . It ...
... descendants of aborigi- nally distinct species , and by other competent judges as mere varieties . If any well marked distinction existed between a domestic race and a species , this source of doubt would not so perpetually recur . It ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young