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 |
From inside the book
Results 1-5 of 96
Page viii
... Weismann's original theory -Deductions from Weismann's theory - Effect of envi- ronment - Weismann's theory and principle of utility— Weismann's theory and the principle of disuse — Pan- mixia - Weismannism as relates to human progress ...
... Weismann's original theory -Deductions from Weismann's theory - Effect of envi- ronment - Weismann's theory and principle of utility— Weismann's theory and the principle of disuse — Pan- mixia - Weismannism as relates to human progress ...
Page ix
... Weismann's germinal selection theory - Criticism of germinal selection - Summary . VIII . NEW LINES OF INVESTIGATION . VARIATION Necessity for new investigations — · Studies from the — standpoint of variation - Variation around a mean ...
... Weismann's germinal selection theory - Criticism of germinal selection - Summary . VIII . NEW LINES OF INVESTIGATION . VARIATION Necessity for new investigations — · Studies from the — standpoint of variation - Variation around a mean ...
Page 102
... Weismann , to be referred to in the next chapter . The two subjects of variation and heredity are so intimately connected with each other that it is hardly possible to separate them . Evidently unless a variation is transmitted to ...
... Weismann , to be referred to in the next chapter . The two subjects of variation and heredity are so intimately connected with each other that it is hardly possible to separate them . Evidently unless a variation is transmitted to ...
Page 138
... in entirely new directions , as we shall see later . It has led to the growth of a distinct school of evolutionists in America , called Neo Lamarckians , and it has even led Professor Weismann 138 THE METHOD OF EVOLUTION.
... in entirely new directions , as we shall see later . It has led to the growth of a distinct school of evolutionists in America , called Neo Lamarckians , and it has even led Professor Weismann 138 THE METHOD OF EVOLUTION.
Page 139
... Weismann to a position in which he admits the in- adequacy of natural selection to meet the problems . Professor Weismann , for reasons to be presently noticed , has become one of the leading exponents of the natural - selection ...
... Weismann to a position in which he admits the in- adequacy of natural selection to meet the problems . Professor Weismann , for reasons to be presently noticed , has become one of the leading exponents of the natural - selection ...
Other editions - View all
Common terms and phrases
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
Popular passages
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.