Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 20
... possess little or no direct information . It is , however , hardly necessary to insist upon the hypothetical quality of such conclusions . Our methods show , then , that organisms and societies exhibit considerable differences as well ...
... possess little or no direct information . It is , however , hardly necessary to insist upon the hypothetical quality of such conclusions . Our methods show , then , that organisms and societies exhibit considerable differences as well ...
Pagina 34
... possess an unjointed rod ( t ) cor- t responding to the endopodite of the FIG . 7.- Astacus fluvia- tilis . Left appendage of the first abdominal segment of the male ( 1,5 / 1 ) : t , unjointed rod ( Huxley ) . second segment , and this ...
... possess an unjointed rod ( t ) cor- t responding to the endopodite of the FIG . 7.- Astacus fluvia- tilis . Left appendage of the first abdominal segment of the male ( 1,5 / 1 ) : t , unjointed rod ( Huxley ) . second segment , and this ...
Pagina 116
... possessed five functional fingers on the fore - feet , and four toes on the hind- feet . The horse still possesses one functional finger and one functional toe , two rudimentary fingers and two rudimentary toes . Two fingers and two ...
... possessed five functional fingers on the fore - feet , and four toes on the hind- feet . The horse still possesses one functional finger and one functional toe , two rudimentary fingers and two rudimentary toes . Two fingers and two ...
Pagina 124
... possess a peduncle or manubrium which some- times has a buccal aperture . The sterile individuals provide nutrition for the others . The organs no longer essential to them atrophy in a variable degree . In the case of some the umbrella ...
... possess a peduncle or manubrium which some- times has a buccal aperture . The sterile individuals provide nutrition for the others . The organs no longer essential to them atrophy in a variable degree . In the case of some the umbrella ...
Pagina 127
... possesses a great number of excretory apertures , the primitive evacuatory appa- ratus - i.e . the contractile cavity ... possess the power of revivifying after complete dessication . At the anterior end of the body , a rotifer possesses ...
... possesses a great number of excretory apertures , the primitive evacuatory appa- ratus - i.e . the contractile cavity ... possess the power of revivifying after complete dessication . At the anterior end of the body , a rotifer possesses ...
Alte ediții - Afișează-le pe toate
Evolution by Atrophy in Biology and Sociology Jean Demoor,Jean Massart,Emile Vandervelde Vizualizare completă - 1899 |
Evolution by Atrophy in Biology and Sociology Jean Demoor,Jean Massart,Emile Vandervelde Vizualizare completă - 1899 |
Evolution by Atrophy in Biology and Sociology Jean Demoor,Jean Massart,Emile Vandervelde Vizualizare completă - 1899 |
Termeni și expresii frecvente
abdominal adaptation to arboreal adult ancestral animal apical leaves appendages aquatic Archaeopteryx assimilative Astacus Astacus fluviatilis atrophy basilar leaves basipodite become biology bipinnated blade branches calcaneum cells characters chlorophyll Choanoflagellates claw collective property colony communities complete condition consists Crustacea custom degenerative evolution digits disappeared Dollo Echinoderms embryology endopodite epipod exhibited existence exopodite ex female fins five-toed floating leaves flowers foliage leaves formed function gill Heterocephalus Huxley hypopod instance institutions joint land larvæ Lathyrus Aphaca leaf leaflets limbs male mammals marriage maxillipede membrane mesonephros metameres metatarsals modification normal origin pairs petiole phalanges physiological pineal eye plants podite primitive progressive protopodite pr Ranunculus reduced regarded remain represented result rods Rosa rugosa rudimentary organs segment social societies sociology species stages stamens stem stipules stomata structure survival tarsius tendrils terrestrial thalamencephalon third tion transformation undergone useless vertebrates vestiges walking legs
Pasaje populare
Pagina 326 - XI. ANIMAL MECHANISM : a Treatise on Terrestrial and Aerial Locomotion. By Professor EJ Marey. With 117 Illustrations. Second Edition. Crown 8vo. price 5*. XII. THE DOCTRINE OF DESCENT AND DARWINISM. By Professor Oscar Schmidt. With 26 Illustrations. Fourth Edition. Crown 8vo. price 5*. XIII. THE HISTORY OF THE CONFLICT BETWEEN RELIGION AND SCIENCE. By JW Draper, MD, LL.D. Fifteenth Edition. Crown 8vo. price 5*. XIV. FUNGI: their Nature, Influences Uses, &c.
Pagina 326 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
Pagina 326 - XI. Animal Mechanism : a Treatise on Terrestrial and Aerial Locomotion. By Professor EJ Marey. With 117 Illustrations. Second Edition. Crown 8vo, $s. XII. The Doctrine of Descent and Darwinism. By Professor Oscar Schmidt. With 26 Illustrations. Fifth Edition. Crown 8vo, 5*.
Pagina 82 - A plant of Drosera, with the edges of its leaves curled inwards, so as to form a temporary stomach, with the glands of the closely inflected tentacles pouring forth their acid secretion, which dissolves animal matter, afterwards to be absorbed, may be said to feed like an animal.
Pagina 326 - Edition. II. PHYSICS and POLITICS ; or, Thoughts on the Application of the Principles of ' Natural Selection ' and ' Inheritance