The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432ÆäÀÌÁö |
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... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges 30 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on natural selection - The term used in a wide sense- e ...
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges 30 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on natural selection - The term used in a wide sense- e ...
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... resemblance of the hair - claspers of the Acarid©¡ . The probable use of the rattle to the Rattle - snake . Helmholtz ... resemblances , enlarged and modified . 516 358 Homological structure of the feet of certain marsupial animals . On ...
... resemblance of the hair - claspers of the Acarid©¡ . The probable use of the rattle to the Rattle - snake . Helmholtz ... resemblances , enlarged and modified . 516 358 Homological structure of the feet of certain marsupial animals . On ...
12 ÆäÀÌÁö
... , much diversity in the breeds ; and that some of these ancient breeds closely resemble , or are even identical with , those still cxist- ing . But this only throws far backwards the history 12 CHARACTER OF DOMESTIC VARIETIES . [ CHAP . I.
... , much diversity in the breeds ; and that some of these ancient breeds closely resemble , or are even identical with , those still cxist- ing . But this only throws far backwards the history 12 CHARACTER OF DOMESTIC VARIETIES . [ CHAP . I.
30 ÆäÀÌÁö
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . BEFORE applying the principles arrived at in the last chapter to organic beings in a state of nature , we must briefly ...
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . BEFORE applying the principles arrived at in the last chapter to organic beings in a state of nature , we must briefly ...
31 ÆäÀÌÁö
... resemble normal structures in widely different animals . Thus pigs have occasionally been born with a sort of proboscis , and if any wild species of the same genus had naturally possessed a proboscis , it might have been argued that ...
... resemble normal structures in widely different animals . Thus pigs have occasionally been born with a sort of proboscis , and if any wild species of the same genus had naturally possessed a proboscis , it might have been argued that ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely fact favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase 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 occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young