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 40
Pagina xi
... than one of anatomical details . The latter characterize small groups , genera , families , or classes ; while the dominant function characterizes all animals of a given grade , even those which through INTRODUCTION xi.
... than one of anatomical details . The latter characterize small groups , genera , families , or classes ; while the dominant function characterizes all animals of a given grade , even those which through INTRODUCTION xi.
Pagina xii
... group throws no little light on the details of its anatomy . * See condensed Chart of Development , etc. , p . 309 . If we can be satisfied that ever higher functions have xii INTRODUCTION CHART SHOWING SEQUENCE OF ATTAINMENTS OF ...
... group throws no little light on the details of its anatomy . * See condensed Chart of Development , etc. , p . 309 . If we can be satisfied that ever higher functions have xii INTRODUCTION CHART SHOWING SEQUENCE OF ATTAINMENTS OF ...
Pagina 21
... groups had to be rearranged . Reptiles and amphibia were at first united in one class because of their resemblance in external form . Our common salamanders look so much like lizards that they generally pass by this name . But the young ...
... groups had to be rearranged . Reptiles and amphibia were at first united in one class because of their resemblance in external form . Our common salamanders look so much like lizards that they generally pass by this name . But the young ...
Pagina 22
... groups of the same class . The paleontologist found that the oldest fossil forms belonged to these generalized groups , and that more highly specialized forms — that is , those in which the special class distinctions were more sharply ...
... groups of the same class . The paleontologist found that the oldest fossil forms belonged to these generalized groups , and that more highly specialized forms — that is , those in which the special class distinctions were more sharply ...
Pagina 23
... groups . The embryos of higher forms , he said , pass through and beyond certain stages of structure , which are permanent in lower and older members of the same group . You remember that the fin on the tail of a fish is as a rule ...
... groups . The embryos of higher forms , he said , pass through and beyond certain stages of structure , which are permanent in lower and older members of the same group . You remember that the fin on the tail of a fish is as a rule ...
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