WAEC Biology 2021 Theory — Question 11
Question 11 of 26 from the West African Examinations Council (WAEC) Biology 2021 Theory paper, with the correct answer and a full explanation.
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3(b). (i) Name four products of decomposition. (ii) Mention three roles of decomposers on a refuse dump.
Model answer
(i) Carbon dioxide; water; heat; nutrients (mineral salts). (ii) They help in cleaning the environment; they help in nutrient recycling; they help in creating space for new organisms/further waste breakdown.
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