The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 5
... actual consanguinity was not discussed , so long as nothing was demanded beyond their juxtaposition , ac- cording to the analogy of their characteristics , without any scrutiny of the deeper causes of their divergence or similarity ...
... actual consanguinity was not discussed , so long as nothing was demanded beyond their juxtaposition , ac- cording to the analogy of their characteristics , without any scrutiny of the deeper causes of their divergence or similarity ...
Стр. 17
... actual sense of the word , imaginary , hypothetical quantities ; and theory seems to indicate that all matter , in the most different phenomena in the material world , is based on a single species of atom . Every manual of physics or ...
... actual sense of the word , imaginary , hypothetical quantities ; and theory seems to indicate that all matter , in the most different phenomena in the material world , is based on a single species of atom . Every manual of physics or ...
Стр. 32
... actual legs , but effect their locomotion by means of a muscular system , closely combined with the integuments , which frequently become an actual muscular cylinder . To this we will add , that the per- plexities and difficulties in ...
... actual legs , but effect their locomotion by means of a muscular system , closely combined with the integuments , which frequently become an actual muscular cylinder . To this we will add , that the per- plexities and difficulties in ...
Стр. 33
... actual skin , which remains soft , and characteristically moist and slimy , owing to the secretions of numerous glands contained in it , and has an inclination to lay itself in folds , and form a mantle - like investment to the body ...
... actual skin , which remains soft , and characteristically moist and slimy , owing to the secretions of numerous glands contained in it , and has an inclination to lay itself in folds , and form a mantle - like investment to the body ...
Стр. 34
... it , that in the actual forms the ground plan , or " ideal types , " find very diversified expression . A further result of this descriptive inquiry is the tree - like grouping of the members of the same 34 THE DOCTRINE OF DESCENT .
... it , that in the actual forms the ground plan , or " ideal types , " find very diversified expression . A further result of this descriptive inquiry is the tree - like grouping of the members of the same 34 THE DOCTRINE OF DESCENT .
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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
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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 - 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.