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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... ranges : this statement is indeed scarcely more than a truism , for if a variety were found to have a wider range than that of its supposed parent - species , their denominations ought to be reversed . But there is also reason to ...
... range of any one species , depending as it does on the range of others , will tend to be sharply defined . Moreover , each species on the con- fines of its range , where it exists in lessened numbers , will , during fluctuations in the ...
... range ; but only that some of the species range very widely ; for the facility with which widely - ranging species vary and give rise to new forms will largely determine their average range . For instance , two varieties of the same ...
Содержание
VARIATION UNDER DOMESTICATION | 7 |
VARIATION UNDER NATURE | 44 |
STRUGGLE FOR EXISTENCE | 60 |
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An Introduction to Behavioural Ecology Nicholas B. Davies,John R. Krebs Недоступно для просмотра - 1993 |