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.
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What is the correct answer to this question?
The same hormone can have different effects depending on the organ
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
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