Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina 10
... remains unbroken.2 When such an individual reproduces 1 We regard the cell as the unit of life , although , according to Altmann , the unit of life is a still simpler structure - the bioblast ... remain attached to 10 EVOLUTION BY ATROPHY.
... remains unbroken.2 When such an individual reproduces 1 We regard the cell as the unit of life , although , according to Altmann , the unit of life is a still simpler structure - the bioblast ... remain attached to 10 EVOLUTION BY ATROPHY.
Pagina 11
... remain attached to it , the whole forms a colony . All the cells of this colony spring then from one single cell ( a fertilized egg cell ) , and an inter- change of nutriment goes on incessantly among these cells . This is what Spencer ...
... remain attached to it , the whole forms a colony . All the cells of this colony spring then from one single cell ( a fertilized egg cell ) , and an inter- change of nutriment goes on incessantly among these cells . This is what Spencer ...
Pagina 52
... remain free and isolated bones . 2 L. Dollo , autographs of the course given at the Institute of Solvay , 1891-1892 , 5th lecture , The Origin of Kangaroos . In the Opossum ( Didelphys ) we find a normal 52 UNIVERSALITY OF DEGENERATIVE ...
... remain free and isolated bones . 2 L. Dollo , autographs of the course given at the Institute of Solvay , 1891-1892 , 5th lecture , The Origin of Kangaroos . In the Opossum ( Didelphys ) we find a normal 52 UNIVERSALITY OF DEGENERATIVE ...
Pagina 65
... remain ; and , after a series M Fio . 33. - Skeleton of hand of Chameleon . ( After Cuvier . ) FIG . 34. Chame'eon . Skele- ton of foot . ( After Cuvier . ) of intermediate conditions , the dolphin is evolved , the fins of which are ...
... remain ; and , after a series M Fio . 33. - Skeleton of hand of Chameleon . ( After Cuvier . ) FIG . 34. Chame'eon . Skele- ton of foot . ( After Cuvier . ) of intermediate conditions , the dolphin is evolved , the fins of which are ...
Pagina 77
... remain within the seed as with Lathyrus Aphaca . The first leaf is upright and reed - like in shape ( fig . 42 , A 1 ) . Its principal function is to pierce the layer of soil which covers the grain , thus allowing the little ter- minal ...
... remain within the seed as with Lathyrus Aphaca . The first leaf is upright and reed - like in shape ( fig . 42 , A 1 ) . Its principal function is to pierce the layer of soil which covers the grain , thus allowing the little ter- minal ...
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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