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 31
Pagina 10
... ment may be very briefly stated as follows : 1. There is in Nature a law of heredity ; like begets like . 2. The offspring is never exactly like the parent ; and the members of the second generation differ more or less from one another ...
... ment may be very briefly stated as follows : 1. There is in Nature a law of heredity ; like begets like . 2. The offspring is never exactly like the parent ; and the members of the second generation differ more or less from one another ...
Pagina 15
... ment of the experience of the race ; and we study it in the full confidence that , if we can deduce its laws , we can rely on racial experience certainly as safely as on that of the individual . Furthermore , if we can dis- cover ...
... ment of the experience of the race ; and we study it in the full confidence that , if we can deduce its laws , we can rely on racial experience certainly as safely as on that of the individual . Furthermore , if we can dis- cover ...
Pagina 19
... ment of their organic systems - muscular , digestive , ner- vous , etc. - they give us a very fair idea of what our ancestor at each stage must have been . But it is on this balance and relative development of the different systems ...
... ment of their organic systems - muscular , digestive , ner- vous , etc. - they give us a very fair idea of what our ancestor at each stage must have been . But it is on this balance and relative development of the different systems ...
Pagina 27
... ment of the most important deep - seated organs . I have chosen a line composed of forms taken from the comparative anatomical series . All such present existing forms have probably been modified during the lapse of ages . But I shall ...
... ment of the most important deep - seated organs . I have chosen a line composed of forms taken from the comparative anatomical series . All such present existing forms have probably been modified during the lapse of ages . But I shall ...
Pagina 59
... ment . They had given up locomotion , had withdrawn , so to speak , from the world ; all the sense they needed was just enough to distinguish the particles of food as they swept past the mouth in the current of water . They have an ...
... ment . They had given up locomotion , had withdrawn , so to speak , from the world ; all the sense they needed was just enough to distinguish the particles of food as they swept past the mouth in the current of water . They have an ...
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