Alternation
31alternation of generations — Biol. the alternation in an organism s life cycle of dissimilar reproductive forms, esp. the alternation of sexual with asexual reproduction. [1855 60] * * * In biology, alternation of a sexual phase (gametophyte) and a nonsexual phase… …
32Alternation (linguistics) — In linguistics, an alternation is the phenomenon of a phoneme or morpheme exhibiting variation in its phonological realization. Each of the various realizations is called an alternant. The variation may be conditioned by the phonological,… …
33alternation of generations — al·ter·na·tion of generations .ȯl tər nā shənalso .al n the occurrence of two or more forms differently produced in the life cycle of a plant or animal usu. involving the regular alternation of a sexual with an asexual generation but not… …
34alternation of generations — The alternation of two or more generations reproducing in different ways; an alternation of sexual and asexual, or parasitic with a free living cycle; see alloiogenesis, digenesis, heterogamy, heterogenesis,heterogonymetagenesis …
35alternation of generations — alterna′tion of genera′tions n. dvl the alternation in an organism s life cycle of dissimilar reproductive forms, esp. the alternation of sexual with asexual generations • Etymology: 1855–60 …
36alternation des multiplicités — multipletiškumų kaita statusas T sritis fizika atitikmenys: angl. alternation of multiplicities vok. Multiplizitätsabwechselung, f rus. чередование мультиплетностей, n pranc. alternation des multiplicités, f …
37alternation of multiplicities — multipletiškumų kaita statusas T sritis fizika atitikmenys: angl. alternation of multiplicities vok. Multiplizitätsabwechselung, f rus. чередование мультиплетностей, n pranc. alternation des multiplicités, f …
38alternation of generations — Date: 1858 the occurrence of two or more forms differently produced in the life cycle of a plant or animal usually involving the regular alternation of a sexual with an asexual generation …
39alternation of generations — noun Biology a pattern of reproduction shown by some lower plants and invertebrates, involving a regular alternation between sexual and asexual forms (as in ferns) or dioecious and parthenogenetic forms (as in some jellyfishes) …
40alternation of life phases — , less correctly alternation of generations. Having distinct sporophytic (diploid), e.g. stems, roots, leaves, cones, etc., and gametophytic (haploid), e.g. tissue within the seeds of cycads and all other seed plants, phases in the life cycle …
