- A Seeds that have been collected specifically from selectively bred parent plant lines over generations under typical conditions
- B Tissue culture (callus formation from explants on hormone-containing media) to produce large numbers of clonal plants
- C Simple stem cuttings that are rooted directly in ordinary garden soil without any special treatment according to standard textbooks
- D Mainly bulbs and tubers that are planted directly into the field without any culturing process in general practice
Correct answer: B. Tissue culture (callus formation from explants on hormone-containing media) to produce large numbers of clonal plants
Explanation: Micropropagation: plant explants (shoot tips, leaves) are cultured on media with auxin and cytokinin ratios controlling callus formation, shoot and root induction, producing thousands of clonal plants.
Concept context
Flower structure, pollination, double fertilization, and seed/fruit development — the highest-scoring Class 12 biology chapter in NEET.
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