The Doctrine of Descent and DarwinismD. Appleton and Company, 1875 - Всего страниц: 334 |
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Стр. 25
... highly developed animal evinces its animal nature by the vivacity with which it reacts to external influences and excitations . In the lower animals the phenomena of life assume a more vegetal character , and in many groups of lower ...
... highly developed animal evinces its animal nature by the vivacity with which it reacts to external influences and excitations . In the lower animals the phenomena of life assume a more vegetal character , and in many groups of lower ...
Стр. 28
... highly complicated a structure , pro- mises a rich development of the interior . The man- ducatory apparatus can be rendered comprehensible only by comparison with the oral organs of the whole insect world . The various divisions of the ...
... highly complicated a structure , pro- mises a rich development of the interior . The man- ducatory apparatus can be rendered comprehensible only by comparison with the oral organs of the whole insect world . The various divisions of the ...
Стр. 29
... highly developed nervous system , and the marvellously complex sensory organs combined with it , of which the eyes are especially remarkable . Independently of the generative organs , consisting of manifold parts of greater or less ...
... highly developed nervous system , and the marvellously complex sensory organs combined with it , of which the eyes are especially remarkable . Independently of the generative organs , consisting of manifold parts of greater or less ...
Стр. 35
... highly ramified trees . Branches ap- peared which terminated after a brief extension ; others are greatly elongated with numerous side branches ; in every branch characteristic phenomena and series are made manifest . Let us attempt it ...
... highly ramified trees . Branches ap- peared which terminated after a brief extension ; others are greatly elongated with numerous side branches ; in every branch characteristic phenomena and series are made manifest . Let us attempt it ...
Стр. 42
... highly - important phenomenon of Alternate Generation , which we must elucidate by a few examples before entering upon the nature of sexual reproduction . Figure 3 shows in A a polype - shaped being with cruciform tentacles , on which ...
... highly - important phenomenon of Alternate Generation , which we must elucidate by a few examples before entering upon the nature of sexual reproduction . Figure 3 shows in A a polype - shaped being with cruciform tentacles , on which ...
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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.