Waec Model Questions Vol1 2021 Biology Question 4
Practice objective / multiple choice question 4 from the 2021 Waec Model Questions Vol1 Biology examination.
In a lake ecosystem the total biomass of phytoplankton (primary producers) is 8 000 kg. Energy transfer between successive trophic levels is 10 % efficient. A fish species (secondary consumer) feeds exclusively on zooplankton (primary consumer) which in turn feeds on the phytoplankton. The fish population currently has a total biomass of 120 kg. (a) What is the minimum biomass that must be present in the zooplankton level to sustain this fish biomass under steady‑state conditions? (b) What percentage of the original phytoplankton biomass is ultimately incorporated into the fish biomass?
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About This Question
This is Waec Model Questions Vol1 2021 Biology Question 4. It is a objective / multiple choice question from the 2021 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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