The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
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Charles Darwin. CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . On the slow and successive appearance of ... period -Alternate Glacial periods in the North and South • 129 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued ...
Charles Darwin. CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . On the slow and successive appearance of ... period -Alternate Glacial periods in the North and South • 129 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - continued ...
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... period , than the absence of any recent de- posits sufficiently extensive to last for even a short geological period . Along the whole west coast , which is inhabited by a peculiar marine fauna , tertiary beds are so poorly developed ...
... period , than the absence of any recent de- posits sufficiently extensive to last for even a short geological period . Along the whole west coast , which is inhabited by a peculiar marine fauna , tertiary beds are so poorly developed ...
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Charles Darwin. which existed in the neighbourhood during the period of its ... Geology , and have been surprised to note how author after author , in treating ... geological age , was deposited during a downward oscillation of level , and ...
Charles Darwin. which existed in the neighbourhood during the period of its ... Geology , and have been surprised to note how author after author , in treating ... geological age , was deposited during a downward oscillation of level , and ...
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... geological record , viewed as a whole , is extremely imperfect ; but if we confine our attention to any one ... period requisite to change one species into another . I am aware that two paleontologists , whose opinions are worthy of much ...
... geological record , viewed as a whole , is extremely imperfect ; but if we confine our attention to any one ... period requisite to change one species into another . I am aware that two paleontologists , whose opinions are worthy of much ...
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... epoch , which forms only a part of one . whole geological period ; and likewise to reflect on the changes of level , on the extreme change of climate , and on the great lapse of time , all included within this same glacial period . Yet ...
... epoch , which forms only a part of one . whole geological period ; and likewise to reflect on the changes of level , on the extreme change of climate , and on the great lapse of time , all included within this same glacial period . Yet ...
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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