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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... slight de- gree in an unusual manner , or a pouter till he saw a pigeon with a crop of somewhat unusual size ; and ... slight , in one's own possession . Nor must the value which would formerly be set on any slight differences in the ...
... slight a degree under nature , then as pollen is already carried regularly from flower to flower , and as a more complete separation of the sexes of our plant would be advantageous on the principle of the division of labour ...
... slight acci- dental alteration in the transparent layers ; and carefully selecting each alteration which , under varied circum- stances , may in any way , or in any degree , tend to pro- duce a distincter image . We must suppose each ...
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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 |