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High auxin concentration may inhibit growth in roots but promote growth in stems. What does this show?

Answer and explanation

Correct answer: The same hormone can have different effects depending on the organ

Auxin regulates plant growth, but different organs have different sensitivities to its concentration. A level that promotes cell elongation in a stem may inhibit elongation in a root. This organ-specific response explains why the same hormone can produce opposite effects, so option A is correct. Auxin is a plant hormone, roots do respond to hormones, and stem growth is not always toward gravity.

Related tags

Control CoordinationAuxinOrgan Specific ResponsePlant HormonesControl And CoordinationScienceClass 10 Mcq

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