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 30
Pagina 20
... characteristics a mammal . It is fish - like only in characteristics which it might eas- ily have acquired in adaptation to its aquatic life . And there are other aquatic mammals , like the seals , in which these characteristics are ...
... characteristics a mammal . It is fish - like only in characteristics which it might eas- ily have acquired in adaptation to its aquatic life . And there are other aquatic mammals , like the seals , in which these characteristics are ...
Pagina 21
... 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 results of adaptation . When the ...
... 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 results of adaptation . When the ...
Pagina 22
... characteristics . Such generalized forms , with the characteristics of the class . less sharply marked , were usually by common consent placed at the bottom of the class . And this suited well their general structure , while in ...
... characteristics . Such generalized forms , with the characteristics of the class . less sharply marked , were usually by common consent placed at the bottom of the class . And this suited well their general structure , while in ...
Pagina 23
... characteristics of extinct genera of mammals exhibit everywhere indications that their living representatives in early life resemble them more than they do their own parents . A minute comparison of a young elephant with any mastodon ...
... characteristics of extinct genera of mammals exhibit everywhere indications that their living representatives in early life resemble them more than they do their own parents . A minute comparison of a young elephant with any mastodon ...
Pagina 41
... characteristics render it probable that it once lived on solid food and was therefore an animal . For where almost the sole difference between plants and animals is in the fluid or solid character of their food , a change from the one ...
... characteristics render it probable that it once lived on solid food and was therefore an animal . For where almost the sole difference between plants and animals is in the fluid or solid character of their food , a change from the one ...
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