Alternation of generations

A If containing chlorophyll, then not with an alternation of generations in which the gametophyte bears multicellular archegonia nor in which there is seed production if not containing chlorophyll then not with an organization of the body into definite... 

I Cytological alternation of generations present, the multicellular phase being a sporophyte.Order Fucales... 

Cytological Alternation of Generations The condition in which there is a regular alternation between haploid and diploid generations which are morphologically similar except that the diploid individuals produce spores and the haploid produce gametes. 

Marine Fern Any sea weed having an alternation of generations homologous to that found in ferns. 

GAMETOPHYTE In the alternation of generations in plants die individual or generation which bears sex organs. 

SpOROPHYTE In plants having alternation of generations, die diploid generation or generation which bears asexual spores. 

Rast DM, Pfyffer GE Acyclic polyols and higher taxa of fiingi. Bot J Linnean Soc 1989 99 39-57. Zuck RK Alternation of generations and the manner of nutrition. Drew Univ Stud 1953 6 1-19. Baldauf SL, Palmer JD Animals and fimgi are each other s closest relatives Congment evidence from multiple proteins. Proc Natl Acad Sci USA 1993 90 11558-11562. 

The general features of the liverwort life cycle are the same as in mosses. Both have a characteristic alternation of generations in which the multicellular diploid sporophyte is dependent on the green and leafy haploid gametophyte. As with mosses, the gametophyte of liverworts is the form most commonly seen in nature. 

Alternation of generations—General feature of the life cycle of many plants, characterized by the occurrence of multiple reproductive forms which often have very different overall body patterns. 

Plants showing a beginning of definite alternation of generations, i.e., gametophyte (sexual phase) alternating with sporophyte... 

The most highly developed cryptogams showing a distinct alternation of generations in their life history. They differ from the Bryophytes in presenting independent, leafy, vascular, root-bearing sporophytes. 

Metagen esis.—Alternation of generations. The production of sexual individuals by asexual means and asexual or neutral individuals by sexual means. 

Haustein, E. (1967). Befmchtung der Archegoniaten und Bliitenpflanzen, in Encyclopedia of Plant Physiology Sexuality, Reproduction, and Alternation of Generations (W. Ruhland, ed.), pp. 407-447. Springer-Verlag, Berlin. 

Due to the poor availability of corporate data, the database is small for individual industry models. The industrial model was thus established on the basis of 153 corporations. The alternative of generating larger samples entails the major problem of making a distinction between industries impossible. Nevertheless, the goal to build further more detailed and homogeneous sector models like an airline model seems to be impossible due to insufficient data. For this reason airlines are rated with the industrial model. 

Hydra). In many cnidarians the Me cycle alternates between these two forms (see alternation OF generations). 

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