Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 40
... stem , and only the protopodite retains its two normal component parts . The mandibles ( fig . 14 ) , the appendages of the fourth segment , are modified entirely for mastica- tion . They consist of a strong transverse piece ( pr ...
... stem , and only the protopodite retains its two normal component parts . The mandibles ( fig . 14 ) , the appendages of the fourth segment , are modified entirely for mastica- tion . They consist of a strong transverse piece ( pr ...
Pagina 68
... stem , and have undergone many in FIG . 37. - Growing point of Vicia varia , showing the origin of leaves . 1 , 2 , 3 , 4 , leaves respectively older ; leaf 1 is still in the primordial condition ; leaf 2 is divided into epipodium and ...
... stem , and have undergone many in FIG . 37. - Growing point of Vicia varia , showing the origin of leaves . 1 , 2 , 3 , 4 , leaves respectively older ; leaf 1 is still in the primordial condition ; leaf 2 is divided into epipodium and ...
Pagina 69
... stem ( the hypopod ) , a distal part ( the epipod ) , and an inter- mediate part ( the mesopod ) . From this point the various parts of the leaf begin to develop individually . Little foliacious lamina ( the stipules ) frequently arise ...
... stem ( the hypopod ) , a distal part ( the epipod ) , and an inter- mediate part ( the mesopod ) . From this point the various parts of the leaf begin to develop individually . Little foliacious lamina ( the stipules ) frequently arise ...
Pagina 73
... stem the leaf blades are more and more reduced , until eventually they are no longer differentiated into hypopod and epipod , but arise directly from the growth of the primordial leaf ( fig . 39 , D to F ) . aquatic plant , the foliage ...
... stem the leaf blades are more and more reduced , until eventually they are no longer differentiated into hypopod and epipod , but arise directly from the growth of the primordial leaf ( fig . 39 , D to F ) . aquatic plant , the foliage ...
Pagina 76
... stem ( fig . 41 , leaves 7 and 8 ) are some leaves consisting of two stipules and a non- branching tendril . The latter represents the meso- pod and the epipod from which the lateral leaflets have disappeared . Below the foliage leaves ...
... stem ( fig . 41 , leaves 7 and 8 ) are some leaves consisting of two stipules and a non- branching tendril . The latter represents the meso- pod and the epipod from which the lateral leaflets have disappeared . Below the foliage leaves ...
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