Why can a high auxin concentration produce different effects in roots and stems?
Answer and explanation
Correct answer: Because different plant parts have different sensitivity to auxin
The governing concept is differential sensitivity to a plant hormone. Roots and stems contain different tissues and respond to auxin at different concentration ranges. A level that promotes elongation in a stem may inhibit root elongation, because roots are generally more sensitive. Hence option A is correct. Roots do not contain brains, stems do not transport blood, and auxin is a plant hormone rather than an animal-only hormone.
Frequently asked questions
What is the correct answer to this question?
Because different plant parts have different sensitivity to auxin
Why is this the correct answer?
The governing concept is differential sensitivity to a plant hormone. Roots and stems contain different tissues and respond to auxin at different concentration ranges. A level that promotes elongation in a stem may inhibit root elongation, because roots are generally more sensitive. Hence option A is correct. Roots do not contain brains, stems do not transport blood, and auxin is a plant hormone rather than an animal-only hormone.
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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