Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 24
... through stages corresponding to those which are to be found in the adult fish , frog , bird , and mammal . In this case the development consists in an increasing com- plexity of the 24 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
... through stages corresponding to those which are to be found in the adult fish , frog , bird , and mammal . In this case the development consists in an increasing com- plexity of the 24 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
Pagina 28
... the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung . Hans Driesch , Leipzig , 1894. ) In an adult cell , adaptation may , in a 28 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
... the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung . Hans Driesch , Leipzig , 1894. ) In an adult cell , adaptation may , in a 28 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
Pagina 29
Jean Demoor, Jean Massart, Emile Vandervelde. In an adult cell , adaptation may , in a more or less normal way , cause the formation of new organs . Even completely specialized cells of an organism may , when placed under certain ...
Jean Demoor, Jean Massart, Emile Vandervelde. In an adult cell , adaptation may , in a more or less normal way , cause the formation of new organs . Even completely specialized cells of an organism may , when placed under certain ...
Pagina 71
... adult branch , have more or less completely lost their assimilative function , and merely serve as a protection to the bud . The hypopod plays an important part in this modifica- tion , but there are evidences of a partial degeneration ...
... adult branch , have more or less completely lost their assimilative function , and merely serve as a protection to the bud . The hypopod plays an important part in this modifica- tion , but there are evidences of a partial degeneration ...
Pagina 79
... adult plant . modifications of either stems , leaves , or roots , the latter being the most rare . We will confine our atten- tion at present to those adapted from leaves . In Cobaea scandens the first two leaves of the seedling usually ...
... adult plant . modifications of either stems , leaves , or roots , the latter being the most rare . We will confine our atten- tion at present to those adapted from leaves . In Cobaea scandens the first two leaves of the seedling usually ...
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