Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 127
... posterior part of the body where there is a bladder . In the Cestodes , however , where the body is very long , the action of the bladder is insufficient to secure a complete evacuation . Secondary apertures are therefore formed at in ...
... posterior part of the body where there is a bladder . In the Cestodes , however , where the body is very long , the action of the bladder is insufficient to secure a complete evacuation . Secondary apertures are therefore formed at in ...
Pagina 128
... posterior part of the intestine has disappeared , although in the young worm the alimentary canal is complete . This modification , though incomplete and appearing only in the adult life of Gordius , is complete In and permanent in some ...
... posterior part of the intestine has disappeared , although in the young worm the alimentary canal is complete . This modification , though incomplete and appearing only in the adult life of Gordius , is complete In and permanent in some ...
Pagina 133
... posterior wings have atrophied and are represented by two reduced organs , the " balancers , " these being absent in certain types . The Strepsiptera form a group of which compara- tively little is yet known ; the larvae live in the ...
... posterior wings have atrophied and are represented by two reduced organs , the " balancers , " these being absent in certain types . The Strepsiptera form a group of which compara- tively little is yet known ; the larvae live in the ...
Pagina 134
... posterior wings , the organs of flight , are folded beneath the wing covers when in repose . In the Scarabæi and the Calosoma the posterior wings are much reduced . In other Coleoptera the wing covers are united by their inner edges ...
... posterior wings , the organs of flight , are folded beneath the wing covers when in repose . In the Scarabæi and the Calosoma the posterior wings are much reduced . In other Coleoptera the wing covers are united by their inner edges ...
Pagina 192
... posterior parts of the third and fourth arches dis- appears the internal and external carotids thus acquire a stem of their own . The parts of the fourth arch remain ; the fifth arch disappears at each side , and the sixth arch forms ...
... posterior parts of the third and fourth arches dis- appears the internal and external carotids thus acquire a stem of their own . The parts of the fourth arch remain ; the fifth arch disappears at each side , and the sixth arch forms ...
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
adaptation adult animals antheridia apical leaves appear appendages aquatic assimilative atrophy basilar leaves become biology blade branches branchial arches Bruges calcaneum canal ceased cells characters chlorophyll collective property colony complete condition consists corporations Court Crustacea custom degeneration degenerative evolution digits disappeared endopodite epipod examples exhibited existence exopodite female feudal flowers foliage leaves formed function Huxley hypopod Illustrations individual instance institutions intercentrum land larvæ larval leaf leaflets limbs lost male mammals marriage masuirs ment mesonephros metatarsals modern modifications muscles normal nutrition original pairs persist petiole phalanges pineal eye plants podite possess posterior primitive Professor pronephros prothallus protopodite reappear reduced regarded remain represent result retracing Rosa rugosa rudimentary organs seedling segment sepal slow-worm social societies sociology species spines stamens stem stipules stomata structure survival tarsius tendrils terminal thalamencephalon tion traces transformation useless vertebral column vertebrates vestiges wings young
Pasaje populare
Pagina ii - GRAHAM, MA, Queen's College, Belfast. $1.75. 69. MAN AND THE GLACIAL PERIOD. By Professor G. FREDERICK WRIGHT, DD, Oberlin Theological Seminary. With 108 Illustrations and 3 Maps.