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A major limitation in the use of the potometer for measuring the rate of transpiration...

Biology
JAMB 1986

A major limitation in the use of the potometer for measuring the rate of transpiration is that

  • A. it is made of breakable glass materials
  • B. it measures the rate of water intake
  • C. it measure the rate of water loss throuh the stern only
  • D. the movement of the air buble in the potometer cannot be timed accurately
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Correct Answer: Option B
Explanation

A potometer does not directly measure the amount of water vapour lost through the leaves (transpiration). Instead, it measures the rate of water uptake by a plant shoot. This is considered a major limitation because not all the water absorbed by the plant is transpired.


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