Biology NEET Full Syllabus Mock Test 180 Questions New Syllabus Mock Test - 7 PCB Single Correct MCQ
Published on: August 14, 2026

Which one of the following growth regulators is known as 'stress hormone'?

A
Abscissic acid
B
Ethylene
C
D
Indole acetic acid

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Abscisic Acid (ABA) is called stress hormone which works in adverse environmental condition when there is low water content in atmosphere or in drought conditions. causes the stomatal closure of leaves due to which the water loss by the plant is minimized.

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