Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 11
... passed through a colonial 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 ...
... passed through a colonial 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 ...
Pagina 19
... passed . Thus , for instance , there still exists in some parts of modern Russia a voluntary agri- cultural commune , for the periodical division of the land , an institution which existed more universally in the sixteenth and ...
... passed . Thus , for instance , there still exists in some parts of modern Russia a voluntary agri- cultural commune , for the periodical division of the land , an institution which existed more universally in the sixteenth and ...
Pagina 23
... 2. Development of organs in the individual . - In the course of embryological development , organs do not exactly repeat the successive phases A B C D through which they passed during their EVOLUTION AND DEGENERATION OF ORGANS 23.
... 2. Development of organs in the individual . - In the course of embryological development , organs do not exactly repeat the successive phases A B C D through which they passed during their EVOLUTION AND DEGENERATION OF ORGANS 23.
Pagina 24
Jean Demoor, Jean Massart, Emile Vandervelde. A B C D through which they passed during their ancestral evolution . Generally speaking , and especially in the case of plants , the development of organs in an individual is direct , and ...
Jean Demoor, Jean Massart, Emile Vandervelde. A B C D through which they passed during their ancestral evolution . Generally speaking , and especially in the case of plants , the development of organs in an individual is direct , and ...
Pagina 41
... passing to the fins . ( d ) The mode of entrance of these nerves into the fins . B. Embryological proofs : ( a ) Continuous lateral folds in the embryoes of fish . ( b ) The formation of metameric pouches ( coelomic in- vaginations not ...
... passing to the fins . ( d ) The mode of entrance of these nerves into the fins . B. Embryological proofs : ( a ) Continuous lateral folds in the embryoes of fish . ( b ) The formation of metameric pouches ( coelomic in- vaginations not ...
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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