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WAEC Biology 2013 Question 8

Question 8

Cell and Its Environment

The opening of the guard cells of the epidermis in plants is by the process of

  1. A.osmosis.
  2. B.diffusion.
  3. C.active transport.
  4. D.transpiration.
Show the answer and explanation

Answer: A (osmosis.)

Explanation

Water enters the guard cells by osmosis, they become turgid and curve apart, opening the stoma.