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 son, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 40
Pagina x
... stages of development and the attainments of each stage have been clearly perceived . In other words , the first prerequisite would seem to be a genealogical tree of the animal kingdom . The means of tracing this genealogical tree are ...
... stages of development and the attainments of each stage have been clearly perceived . In other words , the first prerequisite would seem to be a genealogical tree of the animal kingdom . The means of tracing this genealogical tree are ...
Pagina xi
... stage . He trav- ersed fish , amphibian , and reptilian grades . The oviparous monotreme and the marsupial almost cer- tainly represent lower mammalian ancestral stages . But what kind of fish , what species of amphibian , what form of ...
... stage . He trav- ersed fish , amphibian , and reptilian grades . The oviparous monotreme and the marsupial almost cer- tainly represent lower mammalian ancestral stages . But what kind of fish , what species of amphibian , what form of ...
Pagina xiii
... stages of animal and human development , if we can further be convinced that the sequence is irreversible , we shall be convinced that future man will be more and more com- pletely controlled by the very highest powers or aims to which ...
... stages of animal and human development , if we can further be convinced that the sequence is irreversible , we shall be convinced that future man will be more and more com- pletely controlled by the very highest powers or aims to which ...
Pagina xiv
... or destroy- ing good and bad , fit and unfit , alike . But our history of animal and human progress shows us successive stages , each a little higher than the pre- ceding , and surviving , for a time at least xiv INTRODUCTION PAGE.
... or destroy- ing good and bad , fit and unfit , alike . But our history of animal and human progress shows us successive stages , each a little higher than the pre- ceding , and surviving , for a time at least xiv INTRODUCTION PAGE.
Pagina 5
... stages shows no trace of flowers , but of leaves only . Later a branch or twig , similar in structure to all the rest , shortens . The cells and tis- sues which in other twigs turn into green leaves here become the petals and other ...
... stages shows no trace of flowers , but of leaves only . Later a branch or twig , similar in structure to all the rest , shortens . The cells and tis- sues which in other twigs turn into green leaves here become the petals and other ...
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 - 1897 |
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 beginning better birds body brain cells cerebrum characteristics conformity to environment conscious degeneration dominant ectoderm embryo embryology entoderm experience eyes fish functions future ganglion gastrula germ-plasm give groups heredity 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 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 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 vertebral column vertebrates volvox young