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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... variability . I do not believe that variability is an inherent and necessary contingency , under all circumstances , with all organic beings , as some authors have thought . The effects of variability are modified by various degrees of ...
... variability , which has continually been accumulated by natural selection for the benefit of the species . But as the variability of the extraordinarily - developed part or organ has been so great and long - continued within a period ...
... variability ; and therefore we might expect that such variability would often continue and be super- added to that arising from the mere act of crossing . The slight degree of variability in hybrids from the first cross or in the first ...
Содержание
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 |