Read the following statements about plant hormones: 1. Auxins promote apical dominance. 2. Cytokinins promote senescence. 3. Ethylene accelerates fruit ripening. Which of the above statements are correct?
Only 1 and 3 are correct
Statement 1: Auxin produced at the shoot tip suppresses the growth of lateral buds; this is apical dominance. Correct.
Statement 2: Cytokinins promote cell division and keep leaves green; they delay senescence (ageing) rather than promote it. Incorrect.
Statement 3: Ethylene is the gaseous hormone that accelerates fruit ripening (and leaf/fruit abscission). Correct.
Hence, the answer is: Only 1 and 3 are correct.
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