A plant stem bends towards light in unilateral light. If unequal distribution of auxin is stopped, what will happen?
Answer and explanation
Correct answer: Bending of the stem towards light will greatly decrease
The governing concept is phototropism, in which unequal auxin distribution causes unequal growth on the two sides of a young stem. Normally, auxin accumulates on the shaded side and promotes greater elongation there, so the stem bends towards light. If this unequal distribution is prevented, the difference in growth is reduced and option A follows. The other choices describe impossible or unrelated animal processes.
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What is the correct answer to this question?
Bending of the stem towards light will greatly decrease
Why is this the correct answer?
The governing concept is phototropism, in which unequal auxin distribution causes unequal growth on the two sides of a young stem. Normally, auxin accumulates on the shaded side and promotes greater elongation there, so the stem bends towards light. If this unequal distribution is prevented, the difference in growth is reduced and option A follows. The other choices describe impossible or unrelated animal processes.
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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