The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
Результаты поиска по книге
Результаты 1 – 5 из 43
Стр. 9
... mammal . But the leg of a bird , as a com- plete organ does not har- monize with the leg of other vertebrata until the develop- ment of the bird in the egg reveals that the disposition of the segments and of the articulations is ...
... mammal . But the leg of a bird , as a com- plete organ does not har- monize with the leg of other vertebrata until the develop- ment of the bird in the egg reveals that the disposition of the segments and of the articulations is ...
Стр. 10
... of animals , -how , for instance , the mammal passes through stages at which the lower vertebrata remain fixed , -a connection , at first sight mysterious , is indicated between the evolution of the individual ΙΟ THE DOCTRINE OF DESCENT .
... of animals , -how , for instance , the mammal passes through stages at which the lower vertebrata remain fixed , -a connection , at first sight mysterious , is indicated between the evolution of the individual ΙΟ THE DOCTRINE OF DESCENT .
Стр. 34
... mammal , of one of the parasitic crustacea with a crayfish or an insect , shows , as the older zoology represented it , that in the actual forms the ground plan , or " ideal types , " find very diversified expression . A further result ...
... mammal , of one of the parasitic crustacea with a crayfish or an insect , shows , as the older zoology represented it , that in the actual forms the ground plan , or " ideal types , " find very diversified expression . A further result ...
Стр. 35
... mammals , and this separa- tion and divergence extend to all the subdivisions . We must figuratively represent family branches , clusters of genera , and tufts of species , which latter ramify into sub - species and varieties . With ...
... mammals , and this separa- tion and divergence extend to all the subdivisions . We must figuratively represent family branches , clusters of genera , and tufts of species , which latter ramify into sub - species and varieties . With ...
Стр. 37
... mammal most nearly allied to the birds , though the cause of the bird - like appearance of the lowest mammal known , is by no means to be sought in a direct relationship , but in a remote cousinhood . The But we must draw attention ...
... mammal most nearly allied to the birds , though the cause of the bird - like appearance of the lowest mammal known , is by no means to be sought in a direct relationship , but in a remote cousinhood . The But we must draw attention ...
Другие издания - Просмотреть все
Часто встречающиеся слова и выражения
according adaptation already Ammonites Amphibians animal world apes appearance Ascidian become birds brain carboniferous causes Cetacea character characteristics comparative anatomy complete connection continent Darwin dentition derivation diverge doctrine of Descent Echinoderms embryonic Eocene exhibit existence 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 Insectivora intermediate forms islands lancelet language larva larvæ likewise linguistic 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 strata structure systematic terrestrial animals Tertiary theory of selection tion transformation transition true Ungulata Ungulates varieties vertebral column Vertebrata vertebrate animals whole
Популярные отрывки
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 - 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.