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WAEC Biology 2022 Question 23

Question 23

Photosynthesis and Plant Nutrition

An evidence of the occurrence of photosynthesis in an experiment is the

  1. A.release of carbon(IV) oxide
  2. B.release of oxygen
  3. C.formation of water molecules
  4. D.formation and release of fructose
Show the answer and explanation

Answer: B (release of oxygen)

Explanation

Oxygen is a by-product of photosynthesis, so oxygen given off shows it is taking place.