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MODEL PAPER 3 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 31 Mark
MCQ
Which hormone is responsible for seed dormancy?
  • A
    Auxin
  • B
    ABA
  • C
    Cytokinin
  • D
    Gibberellin
✓

Answer

(b) ABA
Explanation: Abscisic acid encourages fruit to drop and leaves to fall. When the plant is low on water abscisic acid closes the stomata, pores in the leaves. It encourages both seeds and plants to go dormant. The hormone induces seeds to produce proteins to store when the seeds are dormant.

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