In which of the following pairs of organisms is fragmentation the primary method of asexual reproduction?
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Correct answer: Filamentous algae and Protonema of mosses
Fragmentation is the primary asexual method in filamentous algae (e.g., Spirogyra) and the protonema stage of mosses, where the organism breaks into pieces that each develop into a new individual. While Planaria shows regeneration, it is not classified primarily as fragmentation in NCERT.
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