Which plant hormone acts antagonistically to auxins by stimulating cell division and promoting lateral shoot growth?
Answer and explanation
Correct answer: D. Cytokinin
- Step 1: Cytokinins (such as zeatin and kinetin) are synthesized mainly in actively growing root tips. Step 2. They promote cell division (cytokinesis), break apical dominance to stimulate lateral branches, and delay leaf senescence. Answer: Cytokinin. Why not the others: Abscisic acid promotes senescence and dormancy; Ethylene promotes fruit ripening and abscission; Gibberellin elongates stems.
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