Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 13
... protection , can separate their arms from their bodies . Such a separated arm may live , feed and slowly build up again a whole Echinoderm . Plainly , it would be impossible to indicate the precise point at which such an organ should be ...
... protection , can separate their arms from their bodies . Such a separated arm may live , feed and slowly build up again a whole Echinoderm . Plainly , it would be impossible to indicate the precise point at which such an organ should be ...
Pagina 69
... protection to the young organs . The way in which the epipod differentiates varies very much in different cases ... protected by stipules , when there are any . Next , the mesopod grows into the petiole , and the growth of the petiole ...
... protection to the young organs . The way in which the epipod differentiates varies very much in different cases ... protected by stipules , when there are any . Next , the mesopod grows into the petiole , and the growth of the petiole ...
Pagina 71
... protection to the bud . The hypopod plays an important part in this modifica- tion , but there are evidences of a partial degeneration , the epipod being reduced in size in propor- tion as the assimilating function is lost.1 The apical ...
... protection to the bud . The hypopod plays an important part in this modifica- tion , but there are evidences of a partial degeneration , the epipod being reduced in size in propor- tion as the assimilating function is lost.1 The apical ...
Pagina 72
... protecting the bud ; B , C , submerged leaves ; D , E , floating leaves ; F , aërial foliage leaf ; G , leaf protecting the flower - bud ; H , seedling grown from a seed planted in the water on the surface of the mud . I , seed- ling ...
... protecting the bud ; B , C , submerged leaves ; D , E , floating leaves ; F , aërial foliage leaf ; G , leaf protecting the flower - bud ; H , seedling grown from a seed planted in the water on the surface of the mud . I , seed- ling ...
Pagina 73
... protection from rain . When rain falls upon the radical leaves , they are flattened out upon the ground , which prevents them from being torn . This is not so with the apical leaves , and had their primitive structure remained unchanged ...
... protection from rain . When rain falls upon the radical leaves , they are flattened out upon the ground , which prevents them from being torn . This is not so with the apical leaves , and had their primitive structure remained unchanged ...
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