What is metagenesis? Mention an example which exhibits this
phenomenon.
NCERT Class XI
Biology - Exemplar Problems
Chapter 4. Animal Kingdom
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Metagenesis is used in describing life cycle of plants.
Multicellular sporophyte is diploid with 2N paired chromosomes.
Multicellular gametophyte is alternate with multicellular gametophyte and helped with N unpaired chromosomes.
Mature sporophyte mainly produces the spores by the meiosis which is process that results in the reduction of chromosomes by half.
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Metagenesis It is the phenomenon of alternation of generation, i,e ., one diploid generation alternates with the other haploid generation e.g, in Obelia two forms , i.e ., polyp and medusae are present. Polyp form asexually gives rise to medusae and medusae in turn sexually gives rise to polyps.
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