Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 3
... persist as rudiments 1. Absence of variation . Insignificance of the rudi- mentary organ ( stipules of Tropaeolum majus , accessory rudiments of enamel organs in the development of teeth Chapter II . Survival of institutions · § 1 ...
... persist as rudiments 1. Absence of variation . Insignificance of the rudi- mentary organ ( stipules of Tropaeolum majus , accessory rudiments of enamel organs in the development of teeth Chapter II . Survival of institutions · § 1 ...
Pagina 41
... persist in Amphioxus , and which pro- bably existed in the ancestors of vertebrates.1 1 A. Morphological proofs : ( a ) Lateral folds of amphioxus . ( b ) Identity of the skeletons of paired and unpaired fins . ( c ) The number of ...
... persist in Amphioxus , and which pro- bably existed in the ancestors of vertebrates.1 1 A. Morphological proofs : ( a ) Lateral folds of amphioxus . ( b ) Identity of the skeletons of paired and unpaired fins . ( c ) The number of ...
Pagina 147
... persist in a reduced condition ; in other species there are no spores , and the prothalli spring directly from the leaves ( apospory ) . - 5. Phanerogams . Some of the Phanerogams- Silene ( fig . 58 ) , Melandryum , ( fig . 59 ) ...
... persist in a reduced condition ; in other species there are no spores , and the prothalli spring directly from the leaves ( apospory ) . - 5. Phanerogams . Some of the Phanerogams- Silene ( fig . 58 ) , Melandryum , ( fig . 59 ) ...
Pagina 152
... persist , though in a modified condition , or there may remain only traces of the institution in forms , ceremonies , symbols , public games and fêtes , customs and legislative formula . In order to demonstrate this point , it will not ...
... persist , though in a modified condition , or there may remain only traces of the institution in forms , ceremonies , symbols , public games and fêtes , customs and legislative formula . In order to demonstrate this point , it will not ...
Pagina 175
... persist longest that in fact degenerative evolution retraces the steps made by progressive evolution . Peculiarities recently acquired , if they become disused , rapidly disappear , while dispositions of a more ancient kind have a ...
... persist longest that in fact degenerative evolution retraces the steps made by progressive evolution . Peculiarities recently acquired , if they become disused , rapidly disappear , while dispositions of a more ancient kind have 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