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What is a stress hormone? Or The hormone produced during adverse environmental conditions is

1. benzyl aminopurine
2. dichlorophenoxy acetic acid
3. ethylene
4. abscisic acid

Correct answer: abscisic acid

Solution

Abscisic acid is the classic plant stress hormone because it accumulates under adverse conditions like drought, causing stomatal closure and other protective responses. The other options are either growth regulators or synthetic herbicides, not the main stress hormone.

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