Answer 1

1. The given figure indicates the alternation of generation.
2. The life cycle of a plant includes two generations, sporophytic (diploid = 2n) and gametophytic (haploid = n)
3. Some special diploid cells of sporophyte divide by meiosis to produce haploid cells.
4. These haploid cells divide mitotically to produce gametophyte.
5. On maturation, gametophyte produces male and female gametes which fuse during fertilization and produce a diploid zygote.
6. The diploid zygote divides by mitosis and forms a diploid sporophyte.
7. Thus, sporophytic and gametophytic generations generally occur alternately in the life cycle of a plant.
8. Bryophytes and Pteridophytes show distinct alternation of generation.