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GCE Biology 1990 Question 15

Question 15

Support and Movement

The stems of young herbaceous plants are kept upright mainly by

  1. A.osmotic pressure
  2. B.turgor pressure
  3. C.transpiration pull
  4. D.suction pressure
  5. E.root pressure
Show the answer and explanation

Answer: B (turgor pressure)

Explanation

Young stems have little wood; their cells are kept firm by turgor pressure.