The Method of Evolution: A Review of the Present Attitude of Science Toward the Question of the Laws and Forces which Have Brought about the Origin of Species |
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acquired characters acquired variations acters action adapted adult animals and plants arise average become body breeding cells centrosome certainly changes char chemical chemical compound chromatin chromosomes conception conclusion congenital characters congenital variations course cross-breeding Darwin definite lines descent determinate variation difficulty direct discontinuous variations discussion disuse divergence divergent evolution duced effect environment evidence explain eyes fact fittest forces germ plasm germ substance germinal groups habit hap-hazard hereditary influence inheritance of acquired instincts isolation Lamarckian factors Lamarckism large number larvæ matter mean ment method of evolution modified natural selection naturalists Neo-Darwinism occur offspring organic selection origin of species parents preserved principle problem protoplasm question race recognized regard result sexual reproduction sexual union simply specific characters spermatozoön starfish structure struggle for existence study of variation supposed survival theory of heredity tion to-day transmitted vidual Weismann Weismann's theory Weismannian
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Page i - Review of the Present Attitude of Science toward the Question of the Laws and Forces which have brought about the Origin of Species, 1900 : pp.
Page 72 - ... survival of the fittest, and of these that are thus killed doubtless some are superior to those that survive. This principle of indiscriminate elimination does not in the slightest deny the force of the principle of survival of the fittest, but only indicates that its action is not absolutely rigid. The fittest do not always survive, for many of them are destroyed.