Gce Model Questions Vol1 2020 Biology Question 22
Practice objective / multiple choice question 22 from the 2020 Gce Model Questions Vol1 Biology examination.
In a lake ecosystem the primary producers generate 5 000 kcal of energy per day. Energy is transferred to the next trophic level with an efficiency of 10 %, from primary consumers to secondary consumers with 15 % efficiency, and from secondary to tertiary consumers with 5 % efficiency. A particular tertiary‑consumer fish species requires 0.8 kcal per individual per day and currently has a population of 200 individuals. (a) Calculate the total energy available at the tertiary level, (b) determine whether this energy can meet the population's demand, and (c) if not, compute the maximum number of individuals of this fish species that could be sustainably supported.
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This is Gce Model Questions Vol1 2020 Biology Question 22. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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