Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina
... Vertebrates Section II . Rudimentary organs in plants 121 145 • § 3. Rudimentary organs in various groups of plants 145 1. Algæ . 2. Mushrooms . 3. Bryophyta . 4. Pteri- dophyta . 5. Phanerogams 145 § 4. Reduced organs in the vegetative ...
... Vertebrates Section II . Rudimentary organs in plants 121 145 • § 3. Rudimentary organs in various groups of plants 145 1. Algæ . 2. Mushrooms . 3. Bryophyta . 4. Pteri- dophyta . 5. Phanerogams 145 § 4. Reduced organs in the vegetative ...
Pagina 1
... vertebrates 243 2. Plants . Staminodes of Pentstemon 244 Section II . Rudimentary institutions . Levirat . PART III . Summary and conclusions BOOK III CAUSES OF DEGENERATIVE EVOLUTION PART I. Atrophy of organs and institutions . 245 245 ...
... vertebrates 243 2. Plants . Staminodes of Pentstemon 244 Section II . Rudimentary institutions . Levirat . PART III . Summary and conclusions BOOK III CAUSES OF DEGENERATIVE EVOLUTION PART I. Atrophy of organs and institutions . 245 245 ...
Pagina 23
... vertebrates like ? Did these organs develop from existing organs ful- filling other functions , or were they formed inde- pendently ? However that may be , if they arose from other organs , we know nothing of the modifi- cations which ...
... vertebrates like ? Did these organs develop from existing organs ful- filling other functions , or were they formed inde- pendently ? However that may be , if they arose from other organs , we know nothing of the modifi- cations which ...
Pagina 24
... vertebrates : A , the frog ; B , the lizard ; C , the rat ; D , man . The lower series shows the functions . progressive stages in the evolution of the pyramidal cell in the human brain : a , the neuroblast without protoplasmic ...
... vertebrates : A , the frog ; B , the lizard ; C , the rat ; D , man . The lower series shows the functions . progressive stages in the evolution of the pyramidal cell in the human brain : a , the neuroblast without protoplasmic ...
Pagina 41
... vertebrates , but they are universally supposed to have developed from the lateral folds which still persist in Amphioxus , and which pro- bably existed in the ancestors of vertebrates.1 1 A. Morphological proofs : ( a ) Lateral folds ...
... vertebrates , but they are universally supposed to have developed from the lateral folds which still persist in Amphioxus , and which pro- bably existed in the ancestors of vertebrates.1 1 A. Morphological proofs : ( a ) Lateral folds ...
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