A New Theory of Organic EvolutionW. Blackwood and Sons, 1903 - 174 páginas |
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... whether the Darwinian doctrine , that the evolution of life on our planet was brought about by nat- ural selection and other secondary causes , 187014 accords with ascertained facts , or satisfac- torily accounts for.
... whether the Darwinian doctrine , that the evolution of life on our planet was brought about by nat- ural selection and other secondary causes , 187014 accords with ascertained facts , or satisfac- torily accounts for.
Página 2
... SELECTION • V. THE ACCUMULATION 85 OF BENEFICIAL DIFFER- ENCES VI . THE TIME ELEMENT VII . RETROGRESSION 92 98 • 102 VIII . VARIATION • 107 VARIETY OF EXPRESSION ACCIDENTAL ( ? SPONTANEOUS ) VARIATION 108 • 110 SPECIFIC VARIATION 113 IX ...
... SELECTION • V. THE ACCUMULATION 85 OF BENEFICIAL DIFFER- ENCES VI . THE TIME ELEMENT VII . RETROGRESSION 92 98 • 102 VIII . VARIATION • 107 VARIETY OF EXPRESSION ACCIDENTAL ( ? SPONTANEOUS ) VARIATION 108 • 110 SPECIFIC VARIATION 113 IX ...
Página 6
... selection . Evolution is an accepted fact , but it is denied that evolution was brought about by natural selection . The succession of different types , and the fundamental simi- larity in organisation between any race and its ...
... selection . Evolution is an accepted fact , but it is denied that evolution was brought about by natural selection . The succession of different types , and the fundamental simi- larity in organisation between any race and its ...
Página 14
... selecting for breeding purposes animals that , in the breeder's judgment , possess the best expression of the type ; and so again with their progeny . The animals selected are carefully pro- tected from any struggle for existence that ...
... selecting for breeding purposes animals that , in the breeder's judgment , possess the best expression of the type ; and so again with their progeny . The animals selected are carefully pro- tected from any struggle for existence that ...
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... selecting the most vigorous animals and developing their progeny under the most favourable conditions , a full expres- sion of type is evolved . So treated , the herd of the successful breeder will in a few generations approxi- mate ...
... selecting the most vigorous animals and developing their progeny under the most favourable conditions , a full expres- sion of type is evolved . So treated , the herd of the successful breeder will in a few generations approxi- mate ...
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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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