Which plant hormone signals guard cells to close stomata during drought conditions?
A
Abscisic acid
B
Auxin
C
Gibberellin
D
Cytokinin
Correct Answer: Option A — Abscisic acid
Explanation:
Abscisic acid ABA is a plant stress hormone that signals guard cells surrounding stomata to close during drought conditions reducing water l...
Abscisic acid ABA is a plant stress hormone that signals guard cells surrounding stomata to close during drought conditions reducing water loss through transpiration.