What is alternation of generation.Describe how bryophytes exhibit this phenomenon in their life cycle.

Some organisms complete their life cycle in different stages and exhibit alternating body forms. This phenomenon is called Alternation of generation.
Bryophytes such as Liverworts show alternation of generation as its life cycle consists of two stages. The first is the protonema stage (lateral, creeping filamentous stage) which develops directly from a spore. And the second is the Leafy stage which arise from protonema and consists of Gametophytes.
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