The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 79
... advances from the older to the more recent periods ; while the more ancient groups gradually increase and then diminish , as newer , more perfectly or specifically integrated forms , are interposed . The former either vanish entirely or ...
... advances from the older to the more recent periods ; while the more ancient groups gradually increase and then diminish , as newer , more perfectly or specifically integrated forms , are interposed . The former either vanish entirely or ...
Стр. 95
... advance with more sequence and continuity from the observation of details to the whole , to portray its morphology , physiology , and evolutionary history with the utmost completeness . He then challenged the obstructive party with the ...
... advance with more sequence and continuity from the observation of details to the whole , to portray its morphology , physiology , and evolutionary history with the utmost completeness . He then challenged the obstructive party with the ...
Стр. 140
... keep their balance by superior multiplication , speed , and cunning ; the gradual For Wallace's share in this honour , see the end of this chapter . THE STRUGGLE FOR EXISTENCE . Ι4Ι advance of a plant 140 THE DOCTRINE OF DESCENT .
... keep their balance by superior multiplication , speed , and cunning ; the gradual For Wallace's share in this honour , see the end of this chapter . THE STRUGGLE FOR EXISTENCE . Ι4Ι advance of a plant 140 THE DOCTRINE OF DESCENT .
Стр. 141
... advance of a plant is likewise a struggle with natural obstacles ; and the conquest which it gains usually injures other plants in their conditions of life . If the powers of multiplication of any given organism were to operate ...
... advance of a plant is likewise a struggle with natural obstacles ; and the conquest which it gains usually injures other plants in their conditions of life . If the powers of multiplication of any given organism were to operate ...
Стр. 165
... advance . in physiological value , and are outstripped by the more progressive groups which yield to obstacles and profit by them , a course of which human life also affords so many examples . As the phenomena of heredity are usually ...
... advance . in physiological value , and are outstripped by the more progressive groups which yield to obstacles and profit by them , a course of which human life also affords so many examples . As the phenomena of heredity are usually ...
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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.