Waec Model Questions Vol1 2025 Biology Question 41
Practice objective / multiple choice question 41 from the 2025 Waec Model Questions Vol1 Biology examination.
In a freshwater lake, the measured gross primary productivity is 5000 kcal m⁻² yr⁻¹. Phytoplankton respire 30 % of this amount. Energy transferred from one trophic level to the next is 10 %. The lake supports three trophic levels: phytoplankton → zooplankton → small fish. Each gram of small fish requires 5 kcal per day for metabolism. Assuming the system is at steady state, what is the maximum sustainable biomass of small fish per square metre of lake surface, in grams, rounded to two decimal places?
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This is Waec Model Questions Vol1 2025 Biology Question 41. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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