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Which one increases in the absence of light?

1. Uptake of minerals
2. Uptake of water
3. Elongation of internodes
4. Ascent of sap

Correct answer: Elongation of internodes

Solution

In the absence of light, plants often undergo etiolation, where internodes elongate rapidly to help the shoot reach light. Mineral uptake, water uptake, and ascent of sap are not specifically increased just because light is absent.

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