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 71
Pagina xiii
... never forget the existence of the history . Some of the worst errors of biologists are due to their hav- ing forgotten that in the lower stages the germs of the higher must be present , even though invisible to any microscope . Our ...
... never forget the existence of the history . Some of the worst errors of biologists are due to their hav- ing forgotten that in the lower stages the germs of the higher must be present , even though invisible to any microscope . Our ...
Pagina 4
... never gain an inch , the gap between himself and the next higher form shall be far greater than that between himself and the lowest monkey . And if this has been the history of thousands of other species , why should it not be true of ...
... never gain an inch , the gap between himself and the next higher form shall be far greater than that between himself and the lowest monkey . And if this has been the history of thousands of other species , why should it not be true of ...
Pagina 10
... never exactly like the parent ; and the members of the second generation differ more or less from one another . This is especially noticeable in domesticated plants and animals , but no less true of wild forms . If the parent is not ...
... never exactly like the parent ; and the members of the second generation differ more or less from one another . This is especially noticeable in domesticated plants and animals , but no less true of wild forms . If the parent is not ...
Pagina 17
... are saved by hope . " And we may be confident that this hope will never make us ashamed . Finally , even from our present knowledge of the past progress of life we shall hope to catch hints 2 THE PROBLEM : THE MODE OF ITS SOLUTION 17.
... are saved by hope . " And we may be confident that this hope will never make us ashamed . Finally , even from our present knowledge of the past progress of life we shall hope to catch hints 2 THE PROBLEM : THE MODE OF ITS SOLUTION 17.
Pagina 24
... never reach their full development but are absorbed into the pelvis , or into the " plough- share " bone supporting the tail feathers . Thus older forms may be said to have retained throughout life a condition only embryonic in their ...
... never reach their full development but are absorbed into the pelvis , or into the " plough- share " bone supporting the tail feathers . Thus older forms may be said to have retained throughout life a condition only embryonic in their ...
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