- A Plants simply alternate between summer and winter growth phases each year
- B Diploid sporophyte and haploid gametophyte generations alternate in the life cycle
- C Plants alternate between sexual and asexual reproduction depending on the season
- D Different plant species gradually alternate dominance within a single ecosystem
Correct answer: B. Diploid sporophyte and haploid gametophyte generations alternate in the life cycle
Explanation: Alternation of generations: diploid sporophyte (2n) produces haploid spores by meiosis. Spores germinate into haploid gametophyte (n) that produces gametes. Fertilization restores diploid sporophyte.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development — the highest-scoring Class 12 biology chapter in NEET.
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