The Evolution Theory, Volume 2Edward Arnold, 41 & 43 Maddox Street, Bond Street, W., 1904 - Evolution |
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adaptation already amphimixis ancestral animals arise arisen artificial selection assume assumption autotomy become biophors breeds butterflies caterpillar cause cells chance characters chitinous colour combination complete contained Copepods course Crustaceans Darwin definite depend descendants determinants direction disappear diverse effect eggs evolution fact favourable female fertilization flowers fluctuations functional germ germ-cells germ-plasm germinal selection give rise gradually groups hereditary inbreeding increase individual inheritance insects instance islands isolated kind Lamarckian Lamarckian principle large number larva larvæ Lepidoptera living male Metazoa mingling natural selection nauplius Nauplius larva nutritive occur ontogeny origin ovum parent parthenogenetic personal selection phenomena phyletic phyletic evolution phylogeny Planarians plants plasm possess possible primary constituents processes of selection purely reducing division regard regeneration regenerative capacity reproduction result self-fertilization sexual sexual reproduction snails species spermatozoon stage structure struggle for existence sub-dorsal substance theory tion transformation unicellular organisms variational tendencies vary vital units whole workers
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Page 63 - ... varied ; which is very like supposing that an English telegram to China is there received in the Chinese language.
Page 408 - Assistant Physician to the London Hospital and to the Hospital for Sick Children, Great Ormond Street.
Page 119 - ... between all systems of vital units — among the biophors which form the protoplasm of the cell-body, among the cells of a tissue, among the tissues of an organ, among the organs themselves, as well as among the individuals of a species and between species which compete with one another.
Page 409 - THE PHYSIOLOGICAL ACTION OF DRUGS. An Introduction to Practical Pharmacology. By MS PEMBREY, MA, MD, Lecturer on Physiology in Guy's Hospital Medical School ; and CDF PHILLIPS, MD, LL.D. 'Fully Illustrated. Demy 8vo., 4s. 6d. net. PHOTOTHERAPY. By NR FINSEN. Translated by JH SEQUEIRA, MD With Illustrations. Demy 8vo., 4s. 6d. net.
Page 120 - ... an inclined plane, along which it glides very slowly but steadily downwards. The determinant whose assimilative power is weakened by ever so little is continually being robbed by its neighbours of a part of the nourishment which flows towards it, and must consequently become further weakened.
Page 137 - ... external influences." He asks, indeed, " how could the germ-plasm be changed except by the operation of external influences, using the words in their widest sense ? " (" Essays," I, p. 424). And in his recent work he says (II, p. 137) when speaking of some of the influences of external conditions : " I call this form of germinal variation ' induced ' germinal selection, and contrast it with ' spontaneous ' selection, which is caused not by extra-germinal influences but by the chances of the intragerminal...