The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 11
... proved in detail by Agassiz , one of the most vehement antagonists of the theory of descent , we behold the palæontological or his- torical series of organisms in the same sequence as the phases of the development of the individual ...
... proved in detail by Agassiz , one of the most vehement antagonists of the theory of descent , we behold the palæontological or his- torical series of organisms in the same sequence as the phases of the development of the individual ...
Стр. 19
... proved , if in any case a particular motion actually observed to take place in an organism were shown to be mechanically impossible . At pre- sent , neither is to be thought of . Nevertheless , if a decision must be made without full ...
... proved , if in any case a particular motion actually observed to take place in an organism were shown to be mechanically impossible . At pre- sent , neither is to be thought of . Nevertheless , if a decision must be made without full ...
Стр. 30
... proved that animals were not , as people were formerly inclined to suppose , made on a last or shaped upon a block ; but that they fall into several great divisions , in each of which expression is given to a peculiar constitution ...
... proved that animals were not , as people were formerly inclined to suppose , made on a last or shaped upon a block ; but that they fall into several great divisions , in each of which expression is given to a peculiar constitution ...
Стр. 46
... proved that at least one sperm corpuscle , and , as a rule , several or many , must penetrate into the interior of the ovum and unite materially with its substance in order to produce an effectual fecundation . The course of our ...
... proved that at least one sperm corpuscle , and , as a rule , several or many , must penetrate into the interior of the ovum and unite materially with its substance in order to produce an effectual fecundation . The course of our ...
Стр. 58
... prove that it never changes from one type to another . He repudiated the other , and more probable part of this theory , that is , that , at least within the types , the higher groups , in their embryonic phases , repeated the permanent ...
... prove that it never changes from one type to another . He repudiated the other , and more probable part of this theory , that is , that , at least within the types , the higher groups , in their embryonic phases , repeated the permanent ...
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according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit 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 intermediate forms islands lancelet language larva larvæ likewise linguistic Linnæus 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 sponges strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vegetal 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 - I had not formerly sufficiently considered the existence of many structures which appear to be, as far as we can judge, neither beneficial nor injurious ; and this I believe to be one of the greatest oversights as yet detected in my work.
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.