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Which one of the following elements in plants is not remobilised?

1. Phosphorus
2. Calcium
3. Potassium
4. Sulphur

Correct answer: Calcium

Solution

Calcium is not readily remobilised in plants because it is poorly transported in the phloem and tends to remain in older tissues. In contrast, phosphorus, potassium, and sulphur are mobile and can be moved to growing parts when needed.

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