On the Origin of SpeciesHarvard University Press, 2003 - Всего страниц: 553 It is now generally recognized that the publication of Darwin's Origin of Species in 1859 not only decisively altered the basic concepts of biological theory but had a profound and lasting influence on social, philosophic, and religious thought. This work is rightly regarded as one of the most important books ever printed. |
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... allied species inhabit the same territory we surely ought to find at the present time many transitional forms . Let us take a simple case : in travelling from north to south over a continent , we generally meet at successive inter- vals ...
... allied species invading each other's territory , when put into free intercommunication . Undoubtedly if one species has any advantage whatever over another , it will in a very brief time wholly or in part supplant it ; but if both are ...
... allied species , we have no just right to expect often to find intermediate varieties in the intermediate zone . For we have reason to believe that only a few species are undergoing change at any one period ; and all changes are slowly ...
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VARIATION UNDER DOMESTICATION | 7 |
VARIATION UNDER NATURE | 44 |
STRUGGLE FOR EXISTENCE | 60 |
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Publications of the Biological Services Program Biological Services Program (U.S.) Полный просмотр - 1978 |
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An Introduction to Behavioural Ecology Nicholas B. Davies,John R. Krebs Недоступно для просмотра - 1993 |