The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page v
... genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges • . 51 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on.
... genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges • . 51 CHAPTER III . STRUGGLE FOR EXISTENCE . Its bearing on.
Page x
... resemblance between the eyes of Cepha- lopods and Vertebrates . Claparčde on the analogical resemblance of the hair - claspers of the Acarida . The probable use of the rattle to the Rattle - snake . Helmholtz on the imperfection of the ...
... resemblance between the eyes of Cepha- lopods and Vertebrates . Claparčde on the analogical resemblance of the hair - claspers of the Acarida . The probable use of the rattle to the Rattle - snake . Helmholtz on the imperfection of the ...
Page xi
... resemblances , enlarged and modified . Homological structure of the feet of certain mar- supial animals . On serial homologies , corrected . Mr. E. Ray Lankester on morphology . On the asexual reproduction of Chironomus . On the origin ...
... resemblances , enlarged and modified . Homological structure of the feet of certain mar- supial animals . On serial homologies , corrected . Mr. E. Ray Lankester on morphology . On the asexual reproduction of Chironomus . On the origin ...
Page 20
... resemble , or are even identical with , those still existing . But this only throws far backwards the history of civilisation , and shows that animals were domesticated at a much earlier period than has hitherto been supposed . The lake ...
... resemble , or are even identical with , those still existing . But this only throws far backwards the history of civilisation , and shows that animals were domesticated at a much earlier period than has hitherto been supposed . The lake ...
Page 51
... resemble varieties in being very closely , but un- equally , 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 ...
... resemble varieties in being very closely , but un- equally , 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 ...
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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 lamellę larvę 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