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Biology · Oct / Nov 2020 · Paper 12 · Question 12

5090Transpiration and translocation

The diagram shows a cut plant shoot in a container of water. What will stop the movement of water up this stem?

  1. Aa fall in the humidity of the air
  2. Ba rise in the air temperature
  3. Ca blockage in the xylem
  4. Dan insect sucking sugar from the phloem

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Correct answer: C. a blockage in the xylem

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