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In the life cycle of bryophytes there are two morphologically distinct phases (heteromorphic) which regularly alternate each other. The gametophyte which is represented by the thalloid or leafy plant body forms the dominant phase. The sporophyte is a simple structure differentiated into foot, seta and capsule. It is partially or completely dependent upon the gametophyte. The gametophyte gives rise to gametes which fuse to form zygote. The zygote develops into sporophyte that produces spores.