Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 11
... stage , and the members of a colony could not , on separating , become a society . Among the simplest aggregates , all the units are und Entwicklungsfähigkeit kernloser Seeigel - Eier , und über the Möglichkeit ihrer Bastardirung . Arch ...
... stage , and the members of a colony could not , on separating , become a society . Among the simplest aggregates , all the units are und Entwicklungsfähigkeit kernloser Seeigel - Eier , und über the Möglichkeit ihrer Bastardirung . Arch ...
Pagina 24
... stages , it often happens that evolution takes place without leaving traces of the various stages . This is especially the case in complex organs which have been pro- duced by many lines of evolu- tion converging in a single struc- ture ...
... stages , it often happens that evolution takes place without leaving traces of the various stages . This is especially the case in complex organs which have been pro- duced by many lines of evolu- tion converging in a single struc- ture ...
Pagina 27
... stages of concentration . The Cardium of this region exhibits a whole series of adaptive varia- tions . The shells become thinner and horny , their shape elongates , the openings contract , and their colour becomes duller ( Bateson ) ...
... stages of concentration . The Cardium of this region exhibits a whole series of adaptive varia- tions . The shells become thinner and horny , their shape elongates , the openings contract , and their colour becomes duller ( Bateson ) ...
Pagina 28
... stage is reached , that stage slowly completes itself . In the first case the cell adapts itself to the new conditions , in the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung ...
... stage is reached , that stage slowly completes itself . In the first case the cell adapts itself to the new conditions , in the second case it is the blastular which does so . ( See Analytische Theorie der organischen Entwickelung ...
Pagina 50
... third , fourth , and fifth Notes sur les Dinosauriens de Bernissart . Bull . Mus . royal d'Hist . nat . de Belg . 1882 , 1883 , 1884 . to be followed in the second stage by the second 50 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
... third , fourth , and fifth Notes sur les Dinosauriens de Bernissart . Bull . Mus . royal d'Hist . nat . de Belg . 1882 , 1883 , 1884 . to be followed in the second stage by the second 50 UNIVERSALITY OF DEGENERATIVE EVOLUTION.
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
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