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MODEL PAPER 9 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 91 Mark
MCQ
Plant growth regulator that is used in delay in leaf senescence is __________.
  • A
    Ethylene
  • B
    Cytokinin
  • C
    Auxin
  • D
    ABA
✓

Answer

(b) Cytokinin
Explanation: Cytokinins help overcome apical dominance. They promote nutrient mobilization which helps in the delay of leaf senescence.

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