Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 22
... complete each other . Degeneration and progress will appear as the two sides of one whole , or as two aspects of the same evolution , and it will be seen that all progress must necessarily be attended by degenera- tion . CHAPTER I IN ...
... complete each other . Degeneration and progress will appear as the two sides of one whole , or as two aspects of the same evolution , and it will be seen that all progress must necessarily be attended by degenera- tion . CHAPTER I IN ...
Pagina 25
... complete localization of this function , and self- mutilization only results when an exact region of the nervous system is stimulated.2 In the Medusa we find an equally interesting example of functional evolution ( Romanes ) . With some ...
... complete localization of this function , and self- mutilization only results when an exact region of the nervous system is stimulated.2 In the Medusa we find an equally interesting example of functional evolution ( Romanes ) . With some ...
Pagina 28
... complete individual . The same happens even when the first four cells are separated from each other artificially . When this is effected in the case of Echinus or of an Amphioxus embryo of eight cells , each cell developes as if it had ...
... complete individual . The same happens even when the first four cells are separated from each other artificially . When this is effected in the case of Echinus or of an Amphioxus embryo of eight cells , each cell developes as if it had ...
Pagina 31
... complete , consists of three parts - the protopodite ( pr . ) , which is inserted into the body en- .. and carries a ... complete appendage of Astacus fluviatilis pr . br , gill ; ex , exopodite ; en , endo- podite . protopodite ; In ...
... complete , consists of three parts - the protopodite ( pr . ) , which is inserted into the body en- .. and carries a ... complete appendage of Astacus fluviatilis pr . br , gill ; ex , exopodite ; en , endo- podite . protopodite ; In ...
Pagina 32
... complete appendage . The ex , exopodite ; en , endopodite ( Huxley ) . protopodite ( pr . ) is thick and short and has no gill , degeneration being ex- hibited in the loss of the gill , and by the reduced length of the part . The ...
... complete appendage . The ex , exopodite ; en , endopodite ( Huxley ) . protopodite ( pr . ) is thick and short and has no gill , degeneration being ex- hibited in the loss of the gill , and by the reduced length of the part . The ...
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