The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life: Reprinted from the Sixth London Edition, with All Additions and CorrectionsA. L. Burt Company, 1890 - 538페이지 |
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152 페이지
... distinct tranverse bars on its legs , like those on the legs of the zebra . It has been asserted that these are plainest in the foal , and , from inquiries which I have made , I believe this to be true . The stripe on the shoulder is ...
... distinct tranverse bars on its legs , like those on the legs of the zebra . It has been asserted that these are plainest in the foal , and , from inquiries which I have made , I believe this to be true . The stripe on the shoulder is ...
175 페이지
... distinct functions ; thus in the larva of the dragon - fly and in the fish Cobites the alimentary canal respires , digests and excretes . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and ...
... distinct functions ; thus in the larva of the dragon - fly and in the fish Cobites the alimentary canal respires , digests and excretes . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and ...
443 페이지
... distinct genera , but often to distinct families . Had this mimicry occurred in only one or two instances , it might have been passed over as a strange coincidence . But , if we proceed from a district where one Leptalis imi- tates an ...
... distinct genera , but often to distinct families . Had this mimicry occurred in only one or two instances , it might have been passed over as a strange coincidence . But , if we proceed from a district where one Leptalis imi- tates an ...
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adapted admit affinities ALEXANDRE DUMAS allied species America ancient appear 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 Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs paleozoic parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds Silurian SIR WALTER SCOTT slight South America stamens sterility structure successive suppose tend theory tion trees variability variations varieties vary whole widely different wings young