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High auxin concentration may inhibit growth in roots but promote growth in stems. What conclusion follows from this?

Answer and explanation

Correct answer: The effect of the same hormone can depend on the organ and its concentration

The governing concept is differential sensitivity to plant hormones. Roots and stems do not respond identically to the same auxin concentration: a level that promotes elongation in a stem may inhibit elongation in a root. Therefore option A correctly concludes that hormone action depends on both the responding organ and concentration. Auxin is a plant hormone, roots do respond to stimuli, and the stem does not always grow towards water.

Related tags

AuxinPlant HormonesDifferential ResponsePlant HormonesControl And CoordinationScienceClass 10 Mcq

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