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Sinopsis
THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo ries of evolution still find their adherents. These three main theories are so different, that it would seem as if the real na ture of the process of species-formation must for ever remain a subject for speculation only, and as if good facts are wholly wanting. A minority of Biologists adhere to Lamarck's theory of the inheritance of adaptative changes induced by the environ ment; some incline to the view of Darwin and Weismann, that natural selection on· small, individual variations gradually changes species, and still others believe with de Vries, that new species spring into being spontaneously, by mutation, saltation. Judging from this diversity of opinion, it would certainly seem as if no important headway had been made since Darwin. This is very surprising, when we see how in the last fifteen years Genetics has become established as an actively develop ing branch of science, and counts by hundreds the Biolo gists who are engaged in genetical experimental investigations. All the data thus acquired, should have their significance for an insight into the process of evolution, the origin of species.
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THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo ries of evolution still find their adherents. These three main theories are so different, that it would seem as if the real na ture of the process of species-formation must for ever remain a subject for speculation only, and as if good facts are wholly wanting. A minority of Biologists adhere to Lamarck's theory of the inheritance of adaptative changes induced by the environ ment; some incline to the view of Darwin and Weismann, that natural selection on· small, individual variations gradually changes species, and still others believe with de Vries, that new species spring into being spontaneously, by mutation, saltation. Judging from this diversity of opinion, it would certainly seem as if no important headway had been made since Darwin. This is very surprising, when we see how in the last fifteen years Genetics has become established as an actively develop ing branch of science, and counts by hundreds the Biolo gists who are engaged in genetical experimental investigations. All the data thus acquired, should have their significance for an insight into the process of evolution, the origin of species.
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The Relative Value of the Processes Causing Evolution
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The Relative Value of the Processes Causing Evolution
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Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo ries of evolution still find their adherents. These three main theories a. Nº de ref. del artículo: 5837266
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The Relative Value of the Processes Causing Evolution
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Springer Netherlands, 1960
ISBN 10: 9401745641
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Taschenbuch. Condición: Neu. Druck auf Anfrage Neuware - Printed after ordering - THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo ries of evolution still find their adherents. These three main theories are so different, that it would seem as if the real na ture of the process of species-formation must for ever remain a subject for speculation only, and as if good facts are wholly wanting. A minority of Biologists adhere to Lamarck's theory of the inheritance of adaptative changes induced by the environ ment; some incline to the view of Darwin and Weismann, that natural selection on small, individual variations gradually changes species, and still others believe with de Vries, that new species spring into being spontaneously, by mutation, saltation. Judging from this diversity of opinion, it would certainly seem as if no important headway had been made since Darwin. This is very surprising, when we see how in the last fifteen years Genetics has become established as an actively develop ing branch of science, and counts by hundreds the Biolo gists who are engaged in genetical experimental investigations. All the data thus acquired, should have their significance for an insight into the process of evolution, the origin of species. Nº de ref. del artículo: 9789401745642
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The Relative Value of the Processes Causing Evolution
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Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -THE origin of species, the way in which evolution has taken place and is still progressing, seems, even now, to remain an open question. So much so, that three absolutely diverse theo ries of evolution still find their adherents. These three main theories are so different, that it would seem as if the real na ture of the process of species-formation must for ever remain a subject for speculation only, and as if good facts are wholly wanting. A minority of Biologists adhere to Lamarck's theory of the inheritance of adaptative changes induced by the environ ment; some incline to the view of Darwin and Weismann, that natural selection on small, individual variations gradually changes species, and still others believe with de Vries, that new species spring into being spontaneously, by mutation, saltation. Judging from this diversity of opinion, it would certainly seem as if no important headway had been made since Darwin. This is very surprising, when we see how in the last fifteen years Genetics has become established as an actively develop ing branch of science, and counts by hundreds the Biolo gists who are engaged in genetical experimental investigations. All the data thus acquired, should have their significance for an insight into the process of evolution, the origin of species.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 304 pp. Englisch. Nº de ref. del artículo: 9789401745642
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