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 Sons, 1899 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 55
Pagina 4
... better , or whether even man will ever be higher and better than he now is ? Would it not be contrary to the whole course of past history , if you can properly call such a record a history , if he could advance at all ? Now I have no ...
... better , or whether even man will ever be higher and better than he now is ? Would it not be contrary to the whole course of past history , if you can properly call such a record a history , if he could advance at all ? Now I have no ...
Pagina 12
... better escape its enemies or to resist unfavor- able conditions , those of its descendants who inherit most markedly this peculiar quality or variation will be the most likely to escape , those without it to perish . If a form varies ...
... better escape its enemies or to resist unfavor- able conditions , those of its descendants who inherit most markedly this peculiar quality or variation will be the most likely to escape , those without it to perish . If a form varies ...
Pagina 21
... better crustacean . Its molluscan characteristics were only skin - deep , evi- dently an adaptation to a mode of life like that of mollusks . The old artificial systems were based too much on merely external characteristics , the ...
... better crustacean . Its molluscan characteristics were only skin - deep , evi- dently an adaptation to a mode of life like that of mollusks . The old artificial systems were based too much on merely external characteristics , the ...
Pagina 37
... better than one ? We can frame hypotheses ; we know nothing about it . What of the mind of the amœba ? A host of questions throng upon us and we can answer no one of them . All the great questions concerning life confront us here in the ...
... better than one ? We can frame hypotheses ; we know nothing about it . What of the mind of the amœba ? A host of questions throng upon us and we can answer no one of them . All the great questions concerning life confront us here in the ...
Pagina 52
... better done . Three portions can be readily dis- tinguished fore - intestine with the mouth , mid - intes- tine , as the seat of digestion and absorption , and hind- intestine , or rectum , with the anal opening . The front and hind ...
... better done . Three portions can be readily dis- tinguished fore - intestine with the mouth , mid - intes- tine , as the seat of digestion and absorption , and hind- intestine , or rectum , with the anal opening . The front and hind ...
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 - 1896 |
The Whence and the Whither of Man: A Brief History of His Origin and ... John Mason Tyler Visualizzazione completa - 1897 |
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 digestion and reproduction dominant embryo embryology entoderm existence experience eyes fish functions future ganglion gastrula germ-plasm give groups 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 race reflex action reptiles result schematic worm segments selfish sense-organs sequence shell skeleton species spermatozoa stage structure struggle surface survive swimming tion tissues true truth turbellaria unselfishness variation velopment vertebral column vertebrates volvox young