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Unilorin Post-UTME Biology 2022 (Model questions) Question 24

Question 24

Photosynthesis and Plant Nutrition

A box was left in the lawn for two days. When the box was removed the grass under it turned yellow due to lack of

  1. A.carbon dioxide
  2. B.light
  3. C.oxygen
  4. D.water
Show the answer and explanation

Answer: B (light)

Explanation

Without light the grass cannot make chlorophyll or photosynthesise, so it turns yellow.