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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164 페이지
... intermediate varieties will , from reasons already assigned ( namely from what we know of the actual distribution of closely allied representative species , and likewise of acknowl- edged varieties ) , exist in the intermediate zones in ...
... intermediate varieties will , from reasons already assigned ( namely from what we know of the actual distribution of closely allied representative species , and likewise of acknowl- edged varieties ) , exist in the intermediate zones in ...
313 페이지
... intermediate forms must , on the theory , have formerly existed . I have found it difficult , when looking at any two species , to avoid picturing to myself forms directly intermediate between them . But this is a wholly false view ; we ...
... intermediate forms must , on the theory , have formerly existed . I have found it difficult , when looking at any two species , to avoid picturing to myself forms directly intermediate between them . But this is a wholly false view ; we ...
361 페이지
... intermediate in general character between that which preceded and that which succeeded it . Thus the species which lived at the sixth great stage of descent in the diagram are the modified offspring of those which lived at the fifth ...
... intermediate in general character between that which preceded and that which succeeded it . Thus the species which lived at the sixth great stage of descent in the diagram are the modified offspring of those which lived at the fifth ...
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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