Explain briefly the following terms with suitable examples:- (i) protonema
Explanation It is the very first stage in the life cycle of moss. The germination of spore is direct or indirect. In liverworts and hornwort, the germination of spore is direct but the germination of spore in mosses is indirect in mosses a multicellular filament is formed after the germination of spore, the filament is known as protonema. In mosses, a multicellular filament is formed after the germination of spores. This filament is known as protonema. Buds are formed on protonema. Each bud develops and forms a gametophyte plant. Final Answer Protonema is the first stage in the life cycle of a moss, buds are formed on protonema, on this bud gametophyte plant develops.
