WAEC Biology 2025 Theory — Question 9
Question 9 of 21 from the West African Examinations Council (WAEC) Biology 2025 Theory paper, with the correct answer and a full explanation.
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3(a) Explain briefly how carbon (IV) oxide and oxygen are balanced in nature.
Model answer
The balance of carbon dioxide and oxygen in nature is maintained through various biological processes: Photosynthesis - plants absorb CO2 and release O2; Respiration - animals and plants take in O2 and release CO2; Decomposition - decomposers release CO2 during the breakdown of organic matter.
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