Explain the alternation of generation in Fern with the help of a word diagram.
WBBSE
Class X
Life Science
02 (b) Reproduction
2
2024
In the life cycle of a fern, alternation of generation means there are two distinct forms: the sporophytic generation (diploid) and the gametophytic generation (haploid), which alternate with each other. The sporophyte produces haploid spores by meiosis, which grow into a gametophyte. The gametophyte produces gametes that fuse to form a diploid zygote, growing into a new sporophyte.
Word Diagram:
Sporophyte (2n) → Meiosis → Spores (n) → Gametophyte (n) → Gametes (n) → Fertilization → Zygote (2n) → Sporophyte (2n)
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