McqMate
| Q. |
Seed dormancy is regulatedby – |
| A. | Abscisic acid |
| B. | Gibberellic acid |
| C. | Indole acetic acid |
| D. | Ethylene |
| Answer» A. Abscisic acid | |
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Explanation: The transition from dormancy to germination in seeds is a key physiological process during the lifecycle of plants. Abscisic acid (ABA) is the sole plant hormone known to maintain seed dormancy. It acts through a gene expression network involving the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3). |
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