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 - 458페이지 |
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349 페이지
... extinction . So little is this subject understood , that I have heard surprise repeatedly expressed at such great monsters as the Mastodon and the more ancient Din- osaurians having become extinct ; as if mere bodily strength gave ...
... extinction . So little is this subject understood , that I have heard surprise repeatedly expressed at such great monsters as the Mastodon and the more ancient Din- osaurians having become extinct ; as if mere bodily strength gave ...
358 페이지
... extinct species , or group of species , being considered as intermediate between any two living species , or groups of species . If by this term it is meant that an extinct form is directly interme- diate in all its characters between ...
... extinct species , or group of species , being considered as intermediate between any two living species , or groups of species . If by this term it is meant that an extinct form is directly interme- diate in all its characters between ...
359 페이지
... extinct and recent , descended from ( A ) , make , as before remarked , one order ; and this order , from the continued effects of extinction and diverg- ence of character , has become divided into several sub- families and families ...
... extinct and recent , descended from ( A ) , make , as before remarked , one order ; and this order , from the continued effects of extinction and diverg- ence of character , has become divided into several sub- families and families ...
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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