On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle of Life |
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The Origin of Species by Means of Natural Selection: Or, The ..., Том 1 Charles Darwin Просмотр фрагмента - 1972 |
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action adapted advantage allied America amount ancient animals appear become believe birds breeds called cause chapter characters climate closely common compared considered continued crossed descendants developed difficulty distinct divergence domestic doubt effected existing extinct extremely facts favourable fertility flower formations forms genera genus geological give given greater groups habits hand Hence hybrids important improved increase individuals inhabitants inherited insects instance instincts intermediate islands kind known land laws less lines living look males manner means modified namely natural selection naturalists nearly occasional occur offspring organic original parent perfect period plants points pollen present principle probably produced range ranked reason remarked represented seeds seems seen single slight sometimes species sterility structure struggle successive supposed tend theory tion tree variability variations varieties vary whole widely
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Стр. 424 - In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.
Стр. 63 - There is no exception to the rule that every organic being naturally increases at so high a rate, that, if not destroyed, the earth would soon be covered by the progeny of a single pair.
Стр. 79 - I may be allowed to personify the natural preservation or survival of the fittest, cares nothing for appearances, except in so far as they are useful to any being. She can act on every internal organ, on every shade of constitutional difference, on the whole machinery of life. Man selects only for his own good: Nature only for that of the being which she tends.
Стр. 70 - I counted thirtytwo little trees ; and one of them, with twenty-six rings of growth, had during many years tried to raise its head above the stems of the heath, and had failed. No wonder that, as soon as the land was enclosed, it became thickly clothed with vigorously growing young firs. Yet the heath was so extremely barren and so extensive that no one would ever have imagined that cattle would have so closely and effectually searched it for food. Here we see that cattle absolutely determine the...
Стр. 169 - If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.
Стр. 63 - Hence as more individuals are produced than can possibly survive, there must in every case be a struggle for existence, either one individual with another of the same species, or with the individuals of distinct species, or with the physical conditions of life.
Стр. 167 - To suppose that the eye with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest degree.
Стр. 378 - Nothing can be more hopeless than to attempt to explain this similarity of pattern in members of the same class, by utility or by the doctrine of final causes. The hopelessness of the attempt has been expressly admitted by Owen in his most interesting work on the 'Nature of Limbs.
Стр. 187 - Under changed conditions of life, it is at least possible that slight modifications of instinct might be profitable to a species; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving and continually accumulating variations of instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated.
Стр. 165 - I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits, with larger and larger mouths, till a creature was produced as monstrous as a whale.
Библиографические данные
| Название | On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle of Life International science library Nineteenth Century Collections Online (NCCO): Science, Technology, and Medicine: 1780-1925 |
| Автор | Charles Darwin |
| Издатель | Appleton, 1864 |
| Владелец оригинала: | Гарвардский университет |
| Оцифровано | 17 июл 2007 |
| Количество страниц | Всего страниц: 440 |
| Экспорт цитаты | BiBTeX EndNote RefMan |