Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 31
... pair of appendages , the structure of which is based upon that of a complete ap- pendage , but in which many different adaptations have brought about the pr conservation and increase of some of the typical parts , and the partial or ...
... pair of appendages , the structure of which is based upon that of a complete ap- pendage , but in which many different adaptations have brought about the pr conservation and increase of some of the typical parts , and the partial or ...
Pagina 35
... pair of appendages , special degeneration accompanies special adaptive develop- ments as we have shown above . We ... pairs of maxillæ . The eight metameres of the middle of the body form the thorax , and carry on the seventh , eighth ...
... pair of appendages , special degeneration accompanies special adaptive develop- ments as we have shown above . We ... pairs of maxillæ . The eight metameres of the middle of the body form the thorax , and carry on the seventh , eighth ...
Pagina 37
... pairs of appen- dages the exopodite shows most signs of degeneration . We will now examine the com- ponent parts of these appendages ( fig . 11 ) . The protopodite ( pr . ) consists of two parts ( ba . and co . ) , and carries a gill ...
... pairs of appen- dages the exopodite shows most signs of degeneration . We will now examine the com- ponent parts of these appendages ( fig . 11 ) . The protopodite ( pr . ) consists of two parts ( ba . and co . ) , and carries a gill ...
Pagina 38
... pairs of walking legs there is an apparatus consisting of a fixed part - an elongation of the protopodite - and of a ... pair of walking legs , and which is enormously increased in the true claws . In this evolution degeneration is ...
... pairs of walking legs there is an apparatus consisting of a fixed part - an elongation of the protopodite - and of a ... pair of walking legs , and which is enormously increased in the true claws . In this evolution degeneration is ...
Pagina 70
... pairs of leaflets , and also a terminal leaflet - all of which are derived from the epipod . 1 In studying these types we will confine our attention to the leaves arising directly from the foliage leaves , to the exclusion of the floral ...
... pairs of leaflets , and also a terminal leaflet - all of which are derived from the epipod . 1 In studying these types we will confine our attention to the leaves arising directly from the foliage leaves , to the exclusion of the floral ...
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