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Question

Which of the following will affect the active uptake of water?
  1. Transpirational power of the root hairs
  2. Typical tissue organization
  3. Tension due to transpiration
  4. Osmotic concentration of the cell sap of the leaves


Solution

The correct option is C Tension due to transpiration
The rate of absorption of water is almost directly proportional to the rate of transpiration.
Transpiration does not occur in root hairs so there is no transpirational power in root hairs. Tissue organisation and the osmotic concentration of the cell sap do not affect the active uptake of water. 

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