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单词 alternate generation
释义

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alternate generation
alternate generation n. Biology each of the two distinct forms which succeed one another in the life cycle of an organism which undergoes alternation of generations; (also) the occurrence of such a succession of forms (= alternation of generations n. at alternation n. Phrases).
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the world > life > biology > biological processes > procreation or reproduction > types of reproduction > [noun] > alternate generation
alternate generation1841
alternation of generations1845
metagenesis1849
heterogenesis1863
heterogamy1884
heterogeny1886
heterogony1906
1841 T. R. Jones Gen. Outl. Animal Kingdom xxi. 374 The alternate generations are quite dissimilar both in conformation and habits.
1858 G. H. Lewes Sea-side Stud. 293 The doctrine of Alternate generations has been persistently denied.
1912 New Phytologist 11 216 The appearance of a free-living spore-bearing alternate generation.
1974 W. Condry Woodlands iv. 59 As with the oak apple there is an alternate generation. This is reared from tiny inconspicuous galls attached to oak catkins.
2002 C. de Duve Life Evolving xi. 164 Evolution has composed many variations on the basic theme of alternate generation.
extracted from alternateadj.adv.n.
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