Evolution by Atrophy in Biology and SociologyD. Appleton, 1899 - 316 pagini |
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Pagina viii
... leaves ) 1. Rosa rugosa . · 2. Serratula centauroides . Sagittaria sagittifolia . 4. Lathyra Aphaca . Nymphaea dentata • PAGE 46 68 68 3 . 5 . § 5. Modification of organs which are homologous in individuals of different species ...
... leaves ) 1. Rosa rugosa . · 2. Serratula centauroides . Sagittaria sagittifolia . 4. Lathyra Aphaca . Nymphaea dentata • PAGE 46 68 68 3 . 5 . § 5. Modification of organs which are homologous in individuals of different species ...
Pagina x
... leaves ( Vicia , Acacia with phyllodes ) . 2. Organogeny of flowers ( Brassica oleracea var . Botrytis ) . 3. Progressive degeneration of the pro- thallus in phanerogams Chapter II . The path of degeneration in sociology § 1 ...
... leaves ( Vicia , Acacia with phyllodes ) . 2. Organogeny of flowers ( Brassica oleracea var . Botrytis ) . 3. Progressive degeneration of the pro- thallus in phanerogams Chapter II . The path of degeneration in sociology § 1 ...
Pagina xii
... leaf of Nymphaea . ( 3 ) Roots of Utricularia ; coty- ledons of parasitic plants ( Cuscuta , Orobanche ) ; leaves transformed to spines in Phyllocactus crenatus . ( 4 ) Atrophy of the branchial arches in mammals . ( 5 ) Atrophy of ...
... leaf of Nymphaea . ( 3 ) Roots of Utricularia ; coty- ledons of parasitic plants ( Cuscuta , Orobanche ) ; leaves transformed to spines in Phyllocactus crenatus . ( 4 ) Atrophy of the branchial arches in mammals . ( 5 ) Atrophy of ...
Pagina 22
... leaves of parasitic plants , or the dissolution of corporate bodies in a declining state . We propose to show , however , that these two ideas , which at first sight seem contradictory and mutually exclusive , are found , on a strict ...
... leaves of parasitic plants , or the dissolution of corporate bodies in a declining state . We propose to show , however , that these two ideas , which at first sight seem contradictory and mutually exclusive , are found , on a strict ...
Pagina 23
... leaves like in the ancestors of 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 ...
... leaves like in the ancestors of 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 ...
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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