The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 22
... similar , though far weaker and imperceptible to us , did not occur in the elements , that is to say , in the atoms . If we only con- sider that we are as little capable of knowing that the falling stone feels nothing , as that it does ...
... similar , though far weaker and imperceptible to us , did not occur in the elements , that is to say , in the atoms . If we only con- sider that we are as little capable of knowing that the falling stone feels nothing , as that it does ...
Стр. 26
... similar beings are the simplest organisms devoid of organs . While ac- centuating the limits of research as restricted by inade- quate means of observation , we maintain the validity of Rollet's retort , that our reason cannot properly ...
... similar beings are the simplest organisms devoid of organs . While ac- centuating the limits of research as restricted by inade- quate means of observation , we maintain the validity of Rollet's retort , that our reason cannot properly ...
Стр. 28
... similar construction , and varying in number from four to six . The surface of the body is studded with numerous little stinging vesicles , which by their contact stun any smaller animalculæ straying within the reach of the polype , and ...
... similar construction , and varying in number from four to six . The surface of the body is studded with numerous little stinging vesicles , which by their contact stun any smaller animalculæ straying within the reach of the polype , and ...
Стр. 41
... wholly or for the greater part , and yet being able to transfer to the progeny its own characteristics in their full integrity . The simplest case of gemmation is where the parent animal produces one or more gemmules similar to itself ,
... wholly or for the greater part , and yet being able to transfer to the progeny its own characteristics in their full integrity . The simplest case of gemmation is where the parent animal produces one or more gemmules similar to itself ,
Стр. 42
... similar to itself , capable in their turn of producing similar gemmules . Of this , every collection of corals gives numerous examples , and shows how the diversified appearance of the several genera of coral depends merely on minor ...
... similar to itself , capable in their turn of producing similar gemmules . Of this , every collection of corals gives numerous examples , and shows how the diversified appearance of the several genera of coral depends merely on minor ...
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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.