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How does the cuticle layer on leaf surfaces control transpiration in plants?

Answer and explanation

Correct answer: As a waxy layer, it reduces water loss

Correct answer: B. The cuticle is a protective, waxy layer covering the epidermis of many leaves. Because wax does not allow water to pass through easily, the cuticle reduces direct evaporation from the leaf surface. This is especially useful for plants living in dry or hot conditions. Most regulated gas exchange still occurs through stomata, whose opening and closing also affects transpiration. A is wrong because the cuticle generally decreases, rather than increases, water loss. C is wrong because the cuticle is not a water-absorbing root structure. D is wrong because a normal cuticle does not completely stop photosynthesis; light can reach photosynthetic tissues, and gases can exchange through stomata. Memory cue: a waxy cuticle acts like a thin waterproof coat, not like a sponge.

Related tags

CuticleTranspirationLeaf AdaptationHydrological CycleThe Living WorldBiologyClass 11 Mcq

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