Home › CBSE Class 11 (Science) › Biology › Plant Growth and Development › Which PGR stimulates closure of stomata?
Which PGR stimulates closure of stomata?
AAbscisic acid
BAuxin hormone
CGibberellin
DCytokinin
Answer & Solution
Correct answer: A. Abscisic acid
ABA triggers stomatal closure, which helps plants cope with water stress.
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