Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 11
... stage , and the members of a colony could not , on separating , become a society . Among the simplest aggregates , all the units are und Entwicklungsfähigkeit kernloser Seeigel - Eier , und über the Möglichkeit ihrer Bastardirung . Arch ...
... stage , and the members of a colony could not , on separating , become a society . Among the simplest aggregates , all the units are und Entwicklungsfähigkeit kernloser Seeigel - Eier , und über the Möglichkeit ihrer Bastardirung . Arch ...
Pagina 28
... stage is reached , that stage slowly completes itself . In the first case the cell adapts itself to the new conditions , in the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung ...
... stage is reached , that stage slowly completes itself . In the first case the cell adapts itself to the new conditions , in the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung ...
Pagina 50
... , second , third , fourth , and fifth Notes sur les Dinosauriens de Bernissart . Bull . Mus . royal d'Hist . nat . de Belg . 1882 , 1883 , 1884 . toe . to be followed in the second stage by 50 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
... , second , third , fourth , and fifth Notes sur les Dinosauriens de Bernissart . Bull . Mus . royal d'Hist . nat . de Belg . 1882 , 1883 , 1884 . toe . to be followed in the second stage by 50 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
Pagina 51
... stage by the second Then the fourth began to atrophy until the whole weight of the body was supported by the third toe alone , as in the ostrich . 2. Adaptation to leaping - We now come to the various instances of adaptation to leaping ...
... stage by the second Then the fourth began to atrophy until the whole weight of the body was supported by the third toe alone , as in the ostrich . 2. Adaptation to leaping - We now come to the various instances of adaptation to leaping ...
Pagina 53
... and third ( iii . ) toes . This last stage , which represents the present and most perfect adaptation of marsupials to leaping , was attained by the predominance of the fourth toe , TRANSFORMATION OF ORGANS OF ANIMALS 53.
... and third ( iii . ) toes . This last stage , which represents the present and most perfect adaptation of marsupials to leaping , was attained by the predominance of the fourth toe , TRANSFORMATION OF ORGANS OF ANIMALS 53.
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