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If auxin distribution is artificially kept equal in a plant why may stem bending reduce even with one sided light?

Answer and explanation

Correct answer: Because growth of cells on both sides will remain nearly equal

Phototropic bending requires differential growth on the two sides of a shoot. Normally, one-sided light changes auxin distribution, causing greater elongation on one side and bending. If auxin is artificially maintained at equal levels, both sides receive a similar growth stimulus, so their elongation remains nearly equal and curvature decreases. Light can still enter the plant; therefore option A is correct.

Related tags

AuxinPhototropismUnequal-GrowthPlant HormonesControl And CoordinationScienceClass 10 Mcq

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