Waec Model Questions Vol1 2020 Biology Question 45
Practice objective / multiple choice question 45 from the 2020 Waec Model Questions Vol1 Biology examination.
A lake ecosystem has algae (primary producers) with a gross primary productivity (GPP) of 1200 g C m⁻² yr⁻¹ and respiration (R) of 400 g C m⁻² yr⁻¹. Herbivorous zooplankton consume 30 % of the net primary production (NPP). A fish species preys on zooplankton and converts 20 % of the zooplankton biomass it consumes into fish biomass (trophic efficiency). If the lake area is 5 km², calculate the total annual fish biomass production (in kg) supported by this primary production.
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About This Question
This is Waec Model Questions Vol1 2020 Biology Question 45. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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