The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895C. Scribner's son, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 64
Pagina vi
... NATURAL SELECTION AND ENVIRONMENT . . . 152 The reversal of the sequence of functions leads to extermination , degen- eration , or , rarely , to stagnation . - Natural selection becomes more un- sparing as we go higher . - Extinction ...
... NATURAL SELECTION AND ENVIRONMENT . . . 152 The reversal of the sequence of functions leads to extermination , degen- eration , or , rarely , to stagnation . - Natural selection becomes more un- sparing as we go higher . - Extinction ...
Pagina viii
... Natural selection . - Correlation of organs.- Fortuitous variation . - Origin of the fittest . - Nägeli's theory : Initial ten- dency supreme . - Weismann and the Neo - Darwinians : Natural selection omnipotent . - The Neo - Lamarckians ...
... Natural selection . - Correlation of organs.- Fortuitous variation . - Origin of the fittest . - Nägeli's theory : Initial ten- dency supreme . - Weismann and the Neo - Darwinians : Natural selection omnipotent . - The Neo - Lamarckians ...
Pagina x
... natural selection is " omnipotent " or of only secondary importance in evolution , as long as it is a real factor , or which theory of heredity or variation is the more probable . If man has been evolved from simple living sub- stance ...
... natural selection is " omnipotent " or of only secondary importance in evolution , as long as it is a real factor , or which theory of heredity or variation is the more probable . If man has been evolved from simple living sub- stance ...
Pagina xv
... natural selection . And yet Nägeli , and especially Weismann , have had so marked an influence on modern thought that we cannot afford to neglect their theories . We will briefly notice these in the closing chapter . CHAPTER I THE ...
... natural selection . And yet Nägeli , and especially Weismann , have had so marked an influence on modern thought that we cannot afford to neglect their theories . We will briefly notice these in the closing chapter . CHAPTER I THE ...
Pagina 7
... natural and has always been accepted , while the theory of evolu- tion is new and very likely to be as short - lived as many another theory which has for a time fascinated men only to be forgotten or ridiculed . But the idea of ...
... natural and has always been accepted , while the theory of evolu- tion is new and very likely to be as short - lived as many another theory which has for a time fascinated men only to be forgotten or ridiculed . But the idea of ...
Altre edizioni - Visualizza tutto
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1899 |
Parole e frasi comuni
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity higher animals higher forms highest human hydra important increase individual insect instinct intelligence jaws knowledge laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral motives muscles muscular muscular system natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception possible primitive probably progress protoplasm protozoa purely reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young