Chapters on EvolutionChatto & Windus, 1883 - Всего страниц: 383 |
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Стр. 2
... modifications of form , instinct , and habits which they exhibit . " Mr. Darwin's views were no less lucidly expressed . He agreed essentially with Mr. Wallace in attributing the origin of new species to the modification of already ...
... modifications of form , instinct , and habits which they exhibit . " Mr. Darwin's views were no less lucidly expressed . He agreed essentially with Mr. Wallace in attributing the origin of new species to the modification of already ...
Стр. 4
... modification , and the experience of every - day life - seen familiarly in the culture of plants , and in the breeding of horses , cattle , sheep , dogs , and pigeons - amply testifies to the mobility and plasticity of the animal and ...
... modification , and the experience of every - day life - seen familiarly in the culture of plants , and in the breeding of horses , cattle , sheep , dogs , and pigeons - amply testifies to the mobility and plasticity of the animal and ...
Стр. 6
... modification of the old . Mr. Wallace accepts " natural selection " as a true factor , but he does not regard it as operating to the same extent in evolution as did Mr. Darwin . Other biologists , again , are inclined to adopt the idea ...
... modification of the old . Mr. Wallace accepts " natural selection " as a true factor , but he does not regard it as operating to the same extent in evolution as did Mr. Darwin . Other biologists , again , are inclined to adopt the idea ...
Стр. 9
... modification of species and to the evolution of new races . The foregoing statement of the Darwinian theory will enable the reader to follow with greater advantage the arguments and illustra- tions adduced in the succeeding chapters in ...
... modification of species and to the evolution of new races . The foregoing statement of the Darwinian theory will enable the reader to follow with greater advantage the arguments and illustra- tions adduced in the succeeding chapters in ...
Стр. 10
... modification . Here the curious nature of these apparently useless parts is seen to be fully borne out by the idea ... modifications which animal structures have undergone is largely in favour of evolution . The structures specially ...
... modification . Here the curious nature of these apparently useless parts is seen to be fully borne out by the idea ... modifications which animal structures have undergone is largely in favour of evolution . The structures specially ...
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adult air-bladder Amoeba animal or plant animal world animalcule animals and plants appear appendages ascidian Axolotl barnacle become biological bird body bone buds Campodea carpels cells changes chiton cilia colonial common connected constitution crab cross-fertilisation crustaceans curious Darwin degeneration descent discover evolution exhibit existence fact favour fertilisation firstly fish flowers fossil frog geological germ gills higher animals idea illustrated individual insects jaws lampshells lancelet larva larvæ latter life-history likewise limbs living lobster marsupials ment metamorphosis missing links modification molluscs named naturalist nature Nauplius neighbours notochord organisation organs origin pairs phases pistil pollen pollen-grains possess present primitive primrose produced protoplasm pteropod quadrupeds race regarded remarks represented reptiles resemblance Sacculina scientific sea-squirt seen segments skull species spine sponge stage stamens Starfishes stigma structure tail theory tion to-day trace variation varied vertebrate whilst wings worm young zoophyte