On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 |
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8 페이지
... 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 ...
129 페이지
... 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 ...
131 페이지
... 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 ...
138 페이지
... 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 ...
142 페이지
... 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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admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor 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 individuals 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 parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings