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What advanced conclusion about plant growth follows from the roles of gibberellin and cytokinin?

Answer and explanation

Correct answer: Growth is affected by separate controls of cell division and cell elongation

The governing concept is hormonal coordination of plant growth. Gibberellins promote processes such as stem elongation, whereas cytokinins stimulate cell division and support the formation of new cells. Comparing these roles shows that growth is not one single process controlled by one substance; it involves coordinated regulation of both cell division and cell elongation. Hence option A is correct. The other choices wrongly invoke animal nerves, deny chemical regulation, or misidentify plant hormones as human blood hormones.

Related tags

GibberellinCytokininPlant GrowthPlant HormonesControl And CoordinationScienceClass 10 Mcq

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