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JAMB Biology 2000 Question 14

Question 14

Photosynthesis and Plant Nutrition

Use the diagram to answer questions 14 and 15. The substance labelled II originates from

Diagram for this question
  1. A.III only
  2. B.IV only
  3. C.I and IV
  4. D.III and IV.
Show the answer and explanation

Answer: A (III only)

Explanation

The gas (II) collecting at the top is oxygen. In photosynthesis this oxygen comes from water molecules split by light energy, and the water is the part labelled III.