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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... continuous , that it has been continuous during a long period . Geology would lead us to believe that most continents have been broken up into islands even during the later tertiary periods ; and in such islands distinct species might ...
... continuous , that it has been continuous during a long period . Geology would lead us to believe that most continents have been broken up into islands even during the later tertiary periods ; and in such islands distinct species might ...
422 페이지
... continuous land , yet they are inhabited by a vast number of distinct mammals , birds and plants ; so it is , according to Mr. Bates , with the butterflies and other animals inhabiting the great , open , and continuous valley of the ...
... continuous land , yet they are inhabited by a vast number of distinct mammals , birds and plants ; so it is , according to Mr. Bates , with the butterflies and other animals inhabiting the great , open , and continuous valley of the ...
426 페이지
... continuous in time ; for the appar- ent exceptions to the rule are so few that they may fairly be attributed to our not having as yet discovered in an intermediate deposit certain forms which are absent in it , but which occur both ...
... continuous in time ; for the appar- ent exceptions to the rule are so few that they may fairly be attributed to our not having as yet discovered in an intermediate deposit certain forms which are absent in it , but which occur both ...
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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