Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 68
... of a small bud , which grows These foliage leaves , which are solely assimilative , are 68 UNIVERSALITY OF DEGENERATIVE EVOLUTION Modification of the organs of plants Modification of homodynamic organs in the indivi-
... of a small bud , which grows These foliage leaves , which are solely assimilative , are 68 UNIVERSALITY OF DEGENERATIVE EVOLUTION Modification of the organs of plants Modification of homodynamic organs in the indivi-
Pagina 69
... assimilative , are philogenetically the oldest , for the assimilative function of leaves was certainly an earlier function than any they may now exercise ; but it is not un- common to find both basilar ( Niederblätter ) and apical ...
... assimilative , are philogenetically the oldest , for the assimilative function of leaves was certainly an earlier function than any they may now exercise ; but it is not un- common to find both basilar ( Niederblätter ) and apical ...
Pagina 71
... assimilative function , and merely serve as a 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 ...
... assimilative function , and merely serve as a 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 ...
Pagina 72
... assimilative leaves to the basilar and apical leaves , a double adaptation becomes apparent , as in Rosa rugosa . In Rosa rugosa , however , both adaptations were protective , while in Serratula centauroides this is only the case with ...
... assimilative leaves to the basilar and apical leaves , a double adaptation becomes apparent , as in Rosa rugosa . In Rosa rugosa , however , both adaptations were protective , while in Serratula centauroides this is only the case with ...
Pagina 73
... assimilative surface . Further up the 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 ...
... assimilative surface . Further up the 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 ...
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