A New Theory of Organic EvolutionW. Blackwood and Sons, 1903 - 174 páginas |
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Página 28
... history of the offspring of mixed marriages would , we believe , show that un- less they married into a pure race the stock soon became extinct . We know of no stat- istics on this deeply interesting question , but examples will ...
... history of the offspring of mixed marriages would , we believe , show that un- less they married into a pure race the stock soon became extinct . We know of no stat- istics on this deeply interesting question , but examples will ...
Página 29
... 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 , varies in ...
... 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 , varies in ...
Página 79
... history of any pedigreed breed tells us that the breeder , by continuously selecting the best animals in his herd for breeding purposes , and by protecting them in their struggle for exist- ence , developed the breed and established its ...
... history of any pedigreed breed tells us that the breeder , by continuously selecting the best animals in his herd for breeding purposes , and by protecting them in their struggle for exist- ence , developed the breed and established its ...
Página 100
... Again , if we consult historical evidence , we find that the representations of animals in the Egyptian tombs 5000 years old also represent existing species . These figures show no specific variation 100 A NEW THEORY OF EVOLUTION .
... Again , if we consult historical evidence , we find that the representations of animals in the Egyptian tombs 5000 years old also represent existing species . These figures show no specific variation 100 A NEW THEORY OF EVOLUTION .
Página 141
... history or tradition of the origin of the Shetland pony . So far as known , it has always been an inhabitant of the Shetland Islands , and its characteristics have never changed . The ponies are remark- able for good temper , freedom ...
... history or tradition of the origin of the Shetland pony . So far as known , it has always been an inhabitant of the Shetland Islands , and its characteristics have never changed . The ponies are remark- able for good temper , freedom ...
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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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