Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 15
Pagina 67
... occur among mammals unless as an adaptation to aquatic life . Here it is in the atrophy of the roots of the hair that degeneration is manifested . One form of hair , however , is still to be found on Heterocephalus , for there are a few ...
... occur among mammals unless as an adaptation to aquatic life . Here it is in the atrophy of the roots of the hair that degeneration is manifested . One form of hair , however , is still to be found on Heterocephalus , for there are a few ...
Pagina 162
... occur too in France and Belgium , and other countries . The nuptial games of Lower Brittany and Chimay have obviously been derived from it.2 Marriage by purchase . The retrogressive evolu- tion of this form of marriage exhibits the ...
... occur too in France and Belgium , and other countries . The nuptial games of Lower Brittany and Chimay have obviously been derived from it.2 Marriage by purchase . The retrogressive evolu- tion of this form of marriage exhibits the ...
Pagina 193
... occur , it is generally limited to characters coming from comparatively recent ancestors and not even in the most transitory form entering into the formation of the fundamental parts of the plant.1 1 The rarity of recapitulation among ...
... occur , it is generally limited to characters coming from comparatively recent ancestors and not even in the most transitory form entering into the formation of the fundamental parts of the plant.1 1 The rarity of recapitulation among ...
Pagina 199
... occur . Primitively the flower contained only the stamens and pistils , the essential organs of reproduction . But we see that the cauliflower produces first the anterior and posterior sepals ( fig . 69 , A ) , then the lateral sepals ...
... occur . Primitively the flower contained only the stamens and pistils , the essential organs of reproduction . But we see that the cauliflower produces first the anterior and posterior sepals ( fig . 69 , A ) , then the lateral sepals ...
Pagina 202
... occur in the air , and it is no longer necessary for the macrospore to become detached it remains fixed on the individual from which it arose and there proceeds to develop . In the Gymnosperms the archegonia are fully formed in a ...
... occur in the air , and it is no longer necessary for the macrospore to become detached it remains fixed on the individual from which it arose and there proceeds to develop . In the Gymnosperms the archegonia are fully formed in a ...
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
adult ancestral stages animals antheridia apical leaves appear appendages aquatic Archaeopteryx assimilative atrophy basilar leaves became become belonging bipinnated blade branches calcaneum canal cells characters chlorophyll collective property colony complete condition consists corporations Crustacea custom degeneration degenerative evolution digits disappeared embryo endopodite epipod exhibited existence exopodite female feudal floating leaves flowers foliage leaves formation formed function gland Huxley hypopod Illustrations individual instance institutions intercentrum land larval Lathyrus Aphaca leaf leaflets limbs male mammals marriage masuirs maxillipede mesonephros metatarsals modern modification muscles normal original pairs petiole phalanges pineal eye plants podite primitive Professor progressive evolution pronephros prothallus protopodite pr reduced regarded remain represent retracing Rosa rugosa rudimentary organs segment sepal slow-worm social societies sociology species stamens stem stipules stomata structure survival tarsius tendrils terminal thalamencephalon third tion traces transformation undergone useless vertebral column vertebrates vestiges wings
Pasaje populare
Pagina 1 - Animal Mechanism : a Treatise on Terrestrial and Aerial Locomotion. By Professor EJ Marey. With 117 Illustrations. Second Edition. Crown 8vo, 5*.
Pagina 1 - Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
Pagina 1 - Illustrations. $1.50. 2, PHYSICS AND POLITICS; Or, Thoughts on the Application of the Principles of "Natural Selection" and "Inheritance
Pagina 2 - Paris. $2.00. 28. THE CRAYFISH : An Introduction to the Study of Zoology. By TH HUXLEY, FRS With 82 Illustrations. $1.75.
Pagina 1 - By MC COOKE, MA, LL. D. Edited, by the Rev. MJ BERKELEY, MA, FLS With 109 Illustrations. $1.50.
Pagina 3 - University of Berlin. With 63 Illustrations. $1.75. 53. THE MAMMALIA IN THEIR RELATION TO PRIMEVAL TIMES. By Professor OSCAR SCHMIDT, University of Strasburg. With 51 Illustrations. $1.50.
Pagina 3 - MILNE, Imperial College of Engineering, Tokio. With 38 Figures. $1.75. 56. MICROBES, FERMENTS, AND MOULDS. By EL TROUESSART. With 107 Illustrations. $1.50. 57. THE GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION OF ANIMALS. By Professor ANGELO HEILPRIN, Academy of Natural Sciences, Philadelphia.
Pagina 1 - XVIII. THE NATURE OF LIGHT. With a General Account of Physical Optics.
Pagina 3 - Heredity." $1.50. 42. ANTS, BEES, AND WASPS. A Record of Observations of the Habits of the Social Hymenoptera. By Sir JOHN LUBBOCK, Bart., FRS, DCL, LL.