Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 13
... young plants are insufficiently developed to main- tain themselves , the mother - plant continues to supply them with nourishment . As soon , however , as the young shoot can dispense with this support , the runner atrophies , and the ...
... young plants are insufficiently developed to main- tain themselves , the mother - plant continues to supply them with nourishment . As soon , however , as the young shoot can dispense with this support , the runner atrophies , and the ...
Pagina 28
... young organ is born under new conditions that it exhibits new characters . This is not necessarily the case with animals . In an animal organism the separation of the young tissues from the old is not so noticeable as with plants , as ...
... young organ is born under new conditions that it exhibits new characters . This is not necessarily the case with animals . In an animal organism the separation of the young tissues from the old is not so noticeable as with plants , as ...
Pagina 69
... young organs . The way in which the epipod differentiates varies very much in different cases . The lamina is developed from it , and little buds are gradually formed around the point until the whole is ready to branch out . At this ...
... young organs . The way in which the epipod differentiates varies very much in different cases . The lamina is developed from it , and little buds are gradually formed around the point until the whole is ready to branch out . At this ...
Pagina 79
... young leaf of 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 ...
... young leaf of 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 ...
Pagina 119
... young ostriches , for instance . In the adult ostrich the intra - acetabular part is separated from the rest of the muscle , which is attached to the pelvis . Traces remain in the horse of a connection between the intra- and the extra ...
... young ostriches , for instance . In the adult ostrich the intra - acetabular part is separated from the rest of the muscle , which is attached to the pelvis . Traces remain in the horse of a connection between the intra- and the extra ...
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