alleryAmong the five major plant hormones, which group acts as growth inhibitors rather than growth promoters?
AAbscisic acid and ethylene
BAuxins and cytokinins
CGibberellins and auxins
DCytokinins and gibberellins
Answer & Solution
Correct answer: A. Abscisic acid and ethylene
1. The five plant hormones are auxins, cytokinins, gibberellins, abscisic acid and ethylene.
2. Auxins, cytokinins and gibberellins promote plant growth.
3. Abscisic acid and ethylene inhibit plant growth.
4. So the inhibitor pair is abscisic acid and ethylene.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 16 Plant and Animal Hormones "Types of Plant Hormones", p.237_
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