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, 1897 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 27
Pagina 11
... survive . The other fifty - eight die - of starvation , parasites , or other enemies , or from inclement weather . Now which two of all shall survive ? Those naturally best able to escape their enemies or to resist unfavor- able ...
... survive . The other fifty - eight die - of starvation , parasites , or other enemies , or from inclement weather . Now which two of all shall survive ? Those naturally best able to escape their enemies or to resist unfavor- able ...
Pagina 12
... survival of the fittest . " Let us take a single illustration . Many of the species of beetles on oceanic islands have very rudimentary wings , or none at all , and yet their nearest relatives are winged forms on some neighboring ...
... survival of the fittest . " Let us take a single illustration . Many of the species of beetles on oceanic islands have very rudimentary wings , or none at all , and yet their nearest relatives are winged forms on some neighboring ...
Pagina 13
... survive . There would thus be a survival in every generation of a larger proportion of those having the poorest wings , and destruction of those whose wings were strong , or whose habits most active . We have here a natural selection ...
... survive . There would thus be a survival in every generation of a larger proportion of those having the poorest wings , and destruction of those whose wings were strong , or whose habits most active . We have here a natural selection ...
Pagina 87
... survived only in this isolated area , and here apparently only because their isolation preserved them from the competition with higher forms . If the Australian continent had not been thus early cut off from all the rest of the world ...
... survived only in this isolated area , and here apparently only because their isolation preserved them from the competition with higher forms . If the Australian continent had not been thus early cut off from all the rest of the world ...
Pagina 110
... survive . And yet this is not the whole truth . Some power of perception is possessed by every animal . But until muscles had developed the nervous system could be of but little practical value . Knowledge of even a great emergency is ...
... survive . And yet this is not the whole truth . Some power of perception is possessed by every animal . But until muscles had developed the nervous system could be of but little practical value . Knowledge of even a great emergency is ...
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 - 1899 |
Parole e frasi comuni
advance amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite archenteron attained become better birds body brain cells conformity to environment conscious degeneration dominant ectoderm embryo embryology existence experience eyes fish functions future ganglion gastrula gills give groups 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 membrane ment mental mind mode modified mollusks moral mouth muscles muscular muscular system mutability of species natural selection nephridia nerve nervous system never notochord nutriment organs oxygen parapodia perception perivisceral cavity 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 theory of evolution tion tissues true truth turbellaria unselfishness variation velopment vertebrates volvox young