The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 8
... manner offered by the historical development of science . What first strikes the observer of the animal world is , that it consists of apparently innumerable forms . The primary requirement is discrimination and arrange- ment . In the ...
... manner offered by the historical development of science . What first strikes the observer of the animal world is , that it consists of apparently innumerable forms . The primary requirement is discrimination and arrange- ment . In the ...
Стр. 11
... manner , that is to say , without any incomprehensible act of creation ; and during this slow transformation of the earth's crust , we see living beings also gradually increasing , differentiating , and perfecting themselves . Yet more ...
... manner , that is to say , without any incomprehensible act of creation ; and during this slow transformation of the earth's crust , we see living beings also gradually increasing , differentiating , and perfecting themselves . Yet more ...
Стр. 25
... manner so simple and undifferentiated , that we too must attribute to these beings a neutral position betwixt plants and animals . We gain the conviction that the roots of the vegetal . and animal kingdoms are not completely sundered ...
... manner so simple and undifferentiated , that we too must attribute to these beings a neutral position betwixt plants and animals . We gain the conviction that the roots of the vegetal . and animal kingdoms are not completely sundered ...
Стр. 39
... manner , these may be induced to form another crystalline combination . But this is not that con- tinuity of reproduction which links individual to indivi- dual , is not procreation wrapped in a cloud of mystery . Herein , it seems ...
... manner , these may be induced to form another crystalline combination . But this is not that con- tinuity of reproduction which links individual to indivi- dual , is not procreation wrapped in a cloud of mystery . Herein , it seems ...
Стр. 40
... , proceeds in such a manner that the halves are again divided , and the quarters yet again , the whole being thus divided into a greater number of portions , and the parent - creature is resolved into 40 THE DOCTRINE OF DESCENT .
... , proceeds in such a manner that the halves are again divided , and the quarters yet again , the whole being thus divided into a greater number of portions , and the parent - creature is resolved into 40 THE DOCTRINE OF DESCENT .
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according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain carboniferous causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit existence external facts families fauna fish formation fossil Ganoids Gastrula genera genus geological Goethe grade gradually groups Haeckel heredity higher horse human hypothesis idea individual infer Insectivora intermediate forms islands lancelet language larva larvæ likewise linguistic lower mammals Marsupials Medusa ment merely metamorphosis modifications morphological mutability natural selection observation Oolite organisms origin peculiar pedigree perfect period phase phenomena placenta plants polypes possess present primordial progenitors races relations remains reproduction reptiles resemblance Rütimeyer says scarcely scientific separate sexual Silurian skull species strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vertebral column Vertebrata vertebrate animals whole
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Стр. 162 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.18 Darwin always knew that his views would be controversial. A few days before The Origin of Species appeared, Darwin wrote, in a letter to Wallace, 'God knows what...
Стр. 160 - Na'geli on plants, and the remarks by various authors with respect to animals, more especially those recently made by Professor Broca, that in the earlier editions of my Origin of Species I perhaps attributed too much to the action of natural selection or the survival of the fittest.