Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina x
... flowers ( Brassica oleracea var . Botrytis ) . 3. Progressive degeneration of the pro- thallus in phanerogams Chapter II . The path of degeneration in sociology § 1. Investigation of facts · · 1. Tithings , hundreds and counties in ...
... flowers ( Brassica oleracea var . Botrytis ) . 3. Progressive degeneration of the pro- thallus in phanerogams Chapter II . The path of degeneration in sociology § 1. Investigation of facts · · 1. Tithings , hundreds and counties in ...
Pagina xi
... flowers in Melandryum . ( 2 ) Branches of Colletia cruciata , Crataegus , Vicia Fabu , Sempervivum , Veronica , etc. Section II . Rudimentary institutions . · ( 1 ) Truck system and clearing - house . ( 2 ) Corpora- tions and syndicates ...
... flowers in Melandryum . ( 2 ) Branches of Colletia cruciata , Crataegus , Vicia Fabu , Sempervivum , Veronica , etc. Section II . Rudimentary institutions . · ( 1 ) Truck system and clearing - house . ( 2 ) Corpora- tions and syndicates ...
Pagina xii
... flowers ) and of stamens ( Scrophulariacea ) § 2. Atrophy from lack of use 1. Functional inutility : ( 1 ) Etiolated plants and immobile limbs . ( 2 ) Epicotyl and primary leaf of Nymphaea . ( 3 ) Roots of Utricularia ; coty- ledons of ...
... flowers ) and of stamens ( Scrophulariacea ) § 2. Atrophy from lack of use 1. Functional inutility : ( 1 ) Etiolated plants and immobile limbs . ( 2 ) Epicotyl and primary leaf of Nymphaea . ( 3 ) Roots of Utricularia ; coty- ledons of ...
Pagina xiii
... flowers of Ficaria ranuncu- loïdes , Lysimachia Nummularia , Elodea canadensis , stratiotes aloides , cleistogamous flowers , eyes in the male Machaerites § 2. Unfunctional organs which persist as rudiments 1. Absence of variation ...
... flowers of Ficaria ranuncu- loïdes , Lysimachia Nummularia , Elodea canadensis , stratiotes aloides , cleistogamous flowers , eyes in the male Machaerites § 2. Unfunctional organs which persist as rudiments 1. Absence of variation ...
Pagina 23
... flowering plants ? What were the eyes of the first vertebrates like ? Did these organs develop from existing organs ful- filling other functions , or were they formed inde- pendently ? However that may be , if they arose from other ...
... flowering plants ? What were the eyes of the first vertebrates like ? Did these organs develop from existing organs ful- filling other functions , or were they formed inde- pendently ? However that may be , if they arose from other ...
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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