A New Theory of Organic EvolutionW. Blackwood and Sons, 1903 - 174 páginas |
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Página 29
... periods of history , and varying conditions of exist- ence , strongly supports the contention that mental and physical characteristics are equally immutable , although among indi- viduals of the same race , character , like physique ...
... periods of history , and varying conditions of exist- ence , strongly supports the contention that mental and physical characteristics are equally immutable , although among indi- viduals of the same race , character , like physique ...
Página 72
... periods of time , ultimately be- came specific variations , and thus new species arose.1 The principal phenomena adduced in port of these conclusions are- sup- The similarity in structure and organisa- tion of successive types . 1 See ...
... periods of time , ultimately be- came specific variations , and thus new species arose.1 The principal phenomena adduced in port of these conclusions are- sup- The similarity in structure and organisa- tion of successive types . 1 See ...
Página 98
James W. Barclay. CHAPTER VI . THE TIME ELEMENT . THE vastly extended period of time that has elapsed since life first appeared on our globe , is a principal factor in the theory of natural selection . Beneficial differences , originally ...
James W. Barclay. CHAPTER VI . THE TIME ELEMENT . THE vastly extended period of time that has elapsed since life first appeared on our globe , is a principal factor in the theory of natural selection . Beneficial differences , originally ...
Página 99
... period of time is therefore not necessary for their full development ; and That the maximum of these differences dis- closes no tendency to specific variation . The differences among individuals of the same race represent only a more or ...
... period of time is therefore not necessary for their full development ; and That the maximum of these differences dis- closes no tendency to specific variation . The differences among individuals of the same race represent only a more or ...
Página 101
... therefore , as there is evidence , it is against the hypothesis that specific variation has arisen during vastly extended periods of time . CHAPTER VII . RETROGRESSION . THE geological record tells us THE TIME ELEMENT . 101.
... therefore , as there is evidence , it is against the hypothesis that specific variation has arisen during vastly extended periods of time . CHAPTER VII . RETROGRESSION . THE geological record tells us THE TIME ELEMENT . 101.
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According to Darwin accumulation of beneficial ADAM BEDE antecessor appeared Author beneficial differences Blackwood breeder cattle cessive CHAPTER Cheap Edition Cheaper Church of Scotland CLASSICS FOR ENGLISH cloth colour common-sense conclusions conditions of existence Crown 8vo Darwin Darwinian Demy 8vo disuse domestic animals embryo ence evidence evolution evolved expression of type Fcap force French morocco genera George Eliot germ-cell germ-plasm gilt top growth habits History hybrids hypothesis J. G. Lockhart Jacquard loom JAMES JOHN Lectures less highly specialised limp LL.D loom mammal Maps modification natural selection numerous Illustrations OLIPHANT organisation organs Origin of Species paper cover People's Edition phenomena Philosophy Photogravure physique plant Poems Portrait Post 8vo Prof progeny rock-pigeon Romance royal 8vo Scottish Second Edition Second Impression secondary causes seed selective breeding Specific life-force specific variation struggle for existence successive types successor theory Third Edition tion University of Edinburgh vols whale wild species WILLIAM
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