The Whence and the Whither of Man: A Brief History of His Origin and Development Through Conformity to Environment; Being the Morse Lectures of 1895W. Blackwood and Sons, 1896 - 312 pagine |
Dall'interno del libro
Risultati 1-5 di 36
Pagina 11
... Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a lifetime probably ... insect let us suppose that only sixty develop into the first larval , caterpillar , stage . Of these sixty , the ...
... Insects generally from a hundred to a thousand . Even birds , slowly as they increase , produce in a lifetime probably ... insect let us suppose that only sixty develop into the first larval , caterpillar , stage . Of these sixty , the ...
Pagina 13
... insect in a Similarly the million or more young of any species given area may be said to run a race of which the prize is life , and the losing of which means literally death . The competition is inconceivably How indefinitely slight ...
... insect in a Similarly the million or more young of any species given area may be said to run a race of which the prize is life , and the losing of which means literally death . The competition is inconceivably How indefinitely slight ...
Pagina 57
... insects . The molluscan and articulate lines , though divergent , are of great importance to us as throwing a certain amount of light on vertebrate development ; and still more as showing how a ... insect and a WORMS TO VERTEBRATES 57.
... insects . The molluscan and articulate lines , though divergent , are of great importance to us as throwing a certain amount of light on vertebrate development ; and still more as showing how a ... insect and a WORMS TO VERTEBRATES 57.
Pagina 58
... insect and a fish , we find clearly , I think , that the fundamental anatomical dif- ference lies in the skeleton ; and that this resulted from , and almost irrevocably fixed , certain habits of life . We may picture to ourselves the ...
... insect and a fish , we find clearly , I think , that the fundamental anatomical dif- ference lies in the skeleton ; and that this resulted from , and almost irrevocably fixed , certain habits of life . We may picture to ourselves the ...
Pagina 61
... insects , and forms the kingdom of arthropoda . The lower members are still usually reckoned as worms , and are included under the annelids . Of these our common earthworm is a good example , and near them belong - the leeches . But the ...
... insects , and forms the kingdom of arthropoda . The lower members are still usually reckoned as worms , and are included under the annelids . Of these our common earthworm is a good example , and near them belong - the leeches . But the ...
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
amoeba amphibia anatomical ancestors animal kingdom annelid apes appear appetite attained become birds body brain cavity cells cerebrum Cheaper Edition church conformity to environment conscious Crown 8vo degeneration Demy 8vo digestive dominant ectoderm embryo evolution experience eyes Fcap fish functions ganglion gastrula germ-plasm give groups higher forms highest human hydra Illustrations increase individual insect instinct intelligence laws layer legs living locomotion lower mammals man's marsupial ment mental mind mode modified mollusks moral muscles muscular natural selection nerve nervous system never notochord nutriment organs oxygen parapodia perception perivisceral Portrait Post 8vo primitive probably Professor progress protoplasm protozoa purely reflex action reproductive reptiles result schematic worm Scotland segments selfish sense-organs sequence skeleton species stage structure struggle surface survive swimming theory tion true truth turbellaria University of Edinburgh variation velopment vertebral column vertebrates vols volvox WHITHER young