The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 225
... Islands , 134 species of pulmo - gasteropoda were reckoned about ten years ago , of which only 21 were to be found in the Africo - European fauna . These and the 113 other species are mostly confined to narrow districts and single ...
... Islands , 134 species of pulmo - gasteropoda were reckoned about ten years ago , of which only 21 were to be found in the Africo - European fauna . These and the 113 other species are mostly confined to narrow districts and single ...
Стр. 226
... islands , continents , and oceans - only then could the distribution of the present organisms be thoroughly fathomed and established . But in thus ac- knowledging the incompleteness of our statistical means , we are at least able to lay ...
... islands , continents , and oceans - only then could the distribution of the present organisms be thoroughly fathomed and established . But in thus ac- knowledging the incompleteness of our statistical means , we are at least able to lay ...
Стр. 228
... becomes very signi- ficant , and we account for the " repetition " of these forms by derivation . Now if the centres of distribution , at the first glance . ORIGIN OF ISLANDS . 229 extremely numerous , can be 228 THE DOCTRINE OF DESCENT .
... becomes very signi- ficant , and we account for the " repetition " of these forms by derivation . Now if the centres of distribution , at the first glance . ORIGIN OF ISLANDS . 229 extremely numerous , can be 228 THE DOCTRINE OF DESCENT .
Стр. 229
... islands , ” we have first to deal with the fragments of continents . A great number of islands , such as Great Britain and the great Asiatic islands , may be recognized at once as fragments of still existing continents . On the other ...
... islands , ” we have first to deal with the fragments of continents . A great number of islands , such as Great Britain and the great Asiatic islands , may be recognized at once as fragments of still existing continents . On the other ...
Стр. 230
... islands , the richer are they in organisms . Islands detached from continents will , on the contrary , be rich in proportion as they are recent , of which Great Britain bears witness . The more divergent is their fauna , the longer must ...
... islands , the richer are they in organisms . Islands detached from continents will , on the contrary , be rich in proportion as they are recent , of which Great Britain bears witness . The more divergent is their fauna , the longer must ...
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Часто встречающиеся слова и выражения
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.