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WAEC Biology 2010 Question 7

Question 7

Cell and Its Environment

Which of the following processes involves diffusion?

  1. A.Opening and closing of stomatal pores
  2. B.Turgidity of herbaceous plants
  3. C.Absorption of water through the root hairs
  4. D.Absorption of digested food into the villi
Show the answer and explanation

Answer: D (Absorption of digested food into the villi)

Explanation

Digested food such as glucose moves from the gut, where it is concentrated, into the blood in the villi by diffusion. Water uptake and turgidity are osmosis.