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 7
Pagina 11
... productive powers of plants and animals . The female fish produces often many thousands , sometimes hun- dreds of thousands of eggs . Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a ...
... productive powers of plants and animals . The female fish produces often many thousands , sometimes hun- dreds of thousands of eggs . Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a ...
Pagina 42
... productive system they did possess . But the work of arranging these tissues and condensing them into com- pact organs was to be done by the next higher group , the worms . Let us now take a glance at certain stages of em- bryonic ...
... productive system they did possess . But the work of arranging these tissues and condensing them into com- pact organs was to be done by the next higher group , the worms . Let us now take a glance at certain stages of em- bryonic ...
Pagina 73
... productive system holds still to the old type and shows little if any improvement . The excretory organs , kid- neys , are composed primitively of nephridial tubes like those of the schematic worm or annelid , but im- mensely increased ...
... productive system holds still to the old type and shows little if any improvement . The excretory organs , kid- neys , are composed primitively of nephridial tubes like those of the schematic worm or annelid , but im- mensely increased ...
Pagina 137
... productive appetite soon follows . One of these results from the condition of the digestive , the other from that of the reproductive , cells or protoplasm . These appetites are due to some condition in a part of the organism and can be ...
... productive appetite soon follows . One of these results from the condition of the digestive , the other from that of the reproductive , cells or protoplasm . These appetites are due to some condition in a part of the organism and can be ...
Pagina 202
... productive in so far as it gives an immediate return ; it is prospective in proportion as the return is expected largely in the future . A " pocket " may yield an immediate very large return of gold nuggets at a very slight expense of ...
... productive in so far as it gives an immediate return ; it is prospective in proportion as the return is expected largely in the future . A " pocket " may yield an immediate very large return of gold nuggets at a very slight expense 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 - 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