The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1898 |
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... to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and present chapter . . 171 CHAPTER XIV . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY. vi CONTENTS .
... to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and present chapter . . 171 CHAPTER XIV . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY. vi CONTENTS .
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... modification - Classification of varieties - De- scent always used in classification - Analogical or adaptive char- acters -Affinities , general , complex , and radiating - Extinction separates and defines groups - MORPHOLOGY , between ...
... modification - Classification of varieties - De- scent always used in classification - Analogical or adaptive char- acters -Affinities , general , complex , and radiating - Extinction separates and defines groups - MORPHOLOGY , between ...
35 페이지
... modify- ing the reproductive system in a manner leading to mutual sterility , that we have good grounds for admit- ting the directly opposite doctrine of Pallas , namely , that such conditions generally eliminate this tendency ; so that ...
... modify- ing the reproductive system in a manner leading to mutual sterility , that we have good grounds for admit- ting the directly opposite doctrine of Pallas , namely , that such conditions generally eliminate this tendency ; so that ...
49 페이지
... modification and improvement . The main cause , however , of innumerable intermediate links not now occurring everywhere throughout nature , depends on the very process of natural selection , through which new varieties continually take ...
... modification and improvement . The main cause , however , of innumerable intermediate links not now occurring everywhere throughout nature , depends on the very process of natural selection , through which new varieties continually take ...
57 페이지
... modifying the breed ; but by this process of uncon- scious selection , various breeds have been sensibly changed in ... modify a species ; but to the subject of time we must return . On the Poorness of Palaeontological Collections . Now ...
... modifying the breed ; but by this process of uncon- scious selection , various breeds have been sensibly changed in ... modify a species ; but to the subject of time we must return . On the Poorness of Palaeontological Collections . Now ...
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admit affinity allied species ancient animals appear Archipelago arctic areas become believe belonging birds Cambrian changes characters cies classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation palæontologists Palæozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst whole widely different wings