Final answer:
Alternation of generations in plants involves alternating between haploid gametophyte and diploid sporophyte stages, differing in development between Bryophytes and Pteridophytes.
Explanation:
Alternation of generations in plants refers to the alternating life stages between a haploid gametophyte and a diploid sporophyte. This cycle involves both sexual reproduction with gametes and asexual reproduction with spores.
In Bryophytes like mosses, the haploid gametophyte stage is more developed than the sporophyte. In contrast, in Pteridophytes such as ferns, the gametophyte is free-living and structurally distinct from the diploid sporophyte.
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