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Why is a tendril able to coil around a support?

Answer and explanation

Correct answer: Due to unequal growth affected by touch

The governing concept is thigmotropism, a directional growth response to touch. When one side of a tendril contacts a support, growth on the contacted side is reduced or altered relative to the free side. This unequal growth produces bending and eventually coils the tendril around the support, so option A is correct. Plants do not use a brain, spinal cord, blood, or insulin-based animal response for this movement.

Related tags

TendrilThigmotropismUnequal GrowthPlant HormonesControl And CoordinationScienceClass 10 Mcq

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