A botanist observes that a plant's stem is elongating more rapidly than expected in low-light conditions. Which mechanism explains why this occurs?

💡 Explanation

Increased gibberellin signaling promotes stem elongation, even in unfavorable conditions such as low light, because this hormone influences cell division and expansion. Therefore, increased gibberellin accounts for the rapid elongation, rather than abscisic acid, ethylene, or cytokinin which have different primary roles.

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