Describe the alteration of generation seen in pteridophytes

1.	Describe the alteration of generation seen in pteridophytes
Answer» Pteridophytes also show heteromorphic alternation of generation like bryophytes but the dominant phase is sporophyte.Sporophyte is well-differentiated into true stem, leaves, and roots. Sporophyte produces spores all which can be of similar type or of two types. Spores germinate to form small, multicellular, non-vascular free-living photosynthetic thalloid haploid gametophyte called prothallus.Haploid generation called gametophyte undergoes sexual reproduction to produce gametes. Production of gametes involve mitosis, so the gametes are also haploid. The gametes fuse to form a diploid zygote which grows into the next generation, the diploid sporophyte generation (2n). Zygote( diploid oospore) develops into embryo which produces well-differentiated, multicellular sporophyte.\xa0

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