Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 15
Pagina 67
... occur among mammals unless as an adaptation to aquatic life . Here it is in the atrophy of the roots of the hair that degeneration is manifested . One form of hair , however , is still to be found . on Heterocephalus , for there are a ...
... occur among mammals unless as an adaptation to aquatic life . Here it is in the atrophy of the roots of the hair that degeneration is manifested . One form of hair , however , is still to be found . on Heterocephalus , for there are a ...
Pagina 162
... occur too in France and Belgium , and other countries . The nuptial games of Lower Brittany and Chimay have obviously been derived from it.2 Marriage by purchase . The retrogressive evolu- tion of this form of marriage exhibits the ...
... occur too in France and Belgium , and other countries . The nuptial games of Lower Brittany and Chimay have obviously been derived from it.2 Marriage by purchase . The retrogressive evolu- tion of this form of marriage exhibits the ...
Pagina 193
... occur , it is generally limited to characters coming from comparatively recent ancestors and not even in the most transitory form entering into the formation of the fundamental parts of the plant.1 1 The rarity of recapitulation among ...
... occur , it is generally limited to characters coming from comparatively recent ancestors and not even in the most transitory form entering into the formation of the fundamental parts of the plant.1 1 The rarity of recapitulation among ...
Pagina 199
... occur . Primitively the flower contained only the stamens and pistils , the essential organs of reproduction . But we see that the cauliflower produces first the anterior and posterior sepals ( fig . 69 , A ) , then the lateral sepals ...
... occur . Primitively the flower contained only the stamens and pistils , the essential organs of reproduction . But we see that the cauliflower produces first the anterior and posterior sepals ( fig . 69 , A ) , then the lateral sepals ...
Pagina 202
... occur in the air , and it is no longer necessary for the macrospore to become detached : it remains fixed on the individual from which it arose and there proceeds to develop . In the Gymnosperms the archegonia are fully formed in a ...
... occur in the air , and it is no longer necessary for the macrospore to become detached : it remains fixed on the individual from which it arose and there proceeds to develop . In the Gymnosperms the archegonia are fully formed in a ...
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