| 单词 |
anagenesis |
| 释义 |
anagenesis Biol.|ænəˈdʒɛnɪsɪs|
[mod.L., f. Gr. ἀνά up + γένεσις origin: see genesis.]
Progressive or ‘upward’ evolution of species (opp. catagenesis). So anagenetic |ˌænədʒɪˈnɛtɪk| a.
1889A. Hyatt Genesis of Arietidae in Mem. Museum Comp. Zool. XVI. ii. 71 (title) Anagenesis, or the Genesis of Progressive Characteristics. Ibid. 74 The law of succession in anagenesis, therefore, is that progressive species..were the direct descendants of progressive varieties or forms. 1893E. D. Cope in Monist III. 637 The process of evolution may be either progressive (Anagenesis) or retrogressive (Catagenesis). 1896― Organ. Evol. ix. 475, I have termed these classes the Anagenetic, which are exclusively vital... The anagenetic class tends to upward progress in the organic sense. 1953J. S. Huxley Evolution in Action iii. 75 Bernhard Rensch, the German biologist..separated evolutionary processes into cladogenesis, or branching evolution..and anagenesis, or upward evolution. |
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