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JAMB Biology 2001 Question 29

Question 29

Nutrient Cycling

Carbon (IV) oxide content of the atmosphere is least affected by

  1. A.cutting down and clearing of forests
  2. B.forest fires
  3. C.burning of fossil fuels
  4. D.plant and animal respiration.
Show the answer and explanation

Answer: D (plant and animal respiration.)

Explanation

Respiration is part of the balanced carbon cycle, since photosynthesis takes the carbon (IV) oxide back. Deforestation, fires and burning fuels all raise the level.