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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.

Related tags

PhototropismAuxin DistributionPlant HormonesPlant HormonesControl And CoordinationScienceClass 10 Mcq

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