The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1898 |
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Página 8
... mountains of Chili . " I have taken some pains to ascertain the degree of fertility of some of the complex crosses of Rhododendrons , and I am assured that many of them are perfectly fertile . Mr. C. Noble , for instance , informs me ...
... mountains of Chili . " I have taken some pains to ascertain the degree of fertility of some of the complex crosses of Rhododendrons , and I am assured that many of them are perfectly fertile . Mr. C. Noble , for instance , informs me ...
Página 129
... mountains , grassy plains , forests , marshes , lakes , and great rivers , under almost every temperature . There is hardly a climate or condition in the Old World which cannot be paralleled in the New -at least as closely as the same ...
... mountains , grassy plains , forests , marshes , lakes , and great rivers , under almost every temperature . There is hardly a climate or condition in the Old World which cannot be paralleled in the New -at least as closely as the same ...
Página 131
... mountain - ranges , of great deserts and even of large rivers , we find different productions ; though as mountain - chains , deserts , & c . , are not as impassable , or likely to have endured so long , as the oceans separating ...
... mountain - ranges , of great deserts and even of large rivers , we find different productions ; though as mountain - chains , deserts , & c . , are not as impassable , or likely to have endured so long , as the oceans separating ...
Página 138
... mountain ranges , and at distant points in the arctic and antarctic regions ; and secondly ( in the following chap- ter ) , the wide distribution of freshwater productions ; and thirdly , the occurrence of the same terrestrial species ...
... mountain ranges , and at distant points in the arctic and antarctic regions ; and secondly ( in the following chap- ter ) , the wide distribution of freshwater productions ; and thirdly , the occurrence of the same terrestrial species ...
Página 142
... mountain ranges , some at least of the islands would have been formed , like other mountain summits , of granite , meta- morphic schists , old fossiliferous and other rocks , instead of consisting of mere piles of volcanic matter . I ...
... mountain ranges , some at least of the islands would have been formed , like other mountain summits , of granite , meta- morphic schists , old fossiliferous and other rocks , instead of consisting of mere piles of volcanic matter . I ...
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Términos y frases comunes
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