Waec Model Questions Vol1 2024 Biology Question 1

Practice objective / multiple choice question 1 from the 2024 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2024 Biology Objective / Multiple Choice Hard Difficulty
Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

In a grassland ecosystem the gross primary productivity (GPP) is 12,000 kJ m⁻² day⁻¹. Plants respire 55 % of the GPP. Herbivores consume an unknown proportion \(x\) of the net primary productivity (NPP). Carnivores eat 25 % of the herbivore biomass and assimilate 80 % of the energy they ingest. The energy that finally reaches the top‑carnivore level is measured as 240 kJ m⁻² day⁻¹. (a) Determine the percentage \(x\) of NPP that is consumed by herbivores. (b) What percentage of the original GPP is ultimately transferred to the top carnivores?

Answer Options

Correct Answer A. Herbivores consume 22.22 % of NPP; 2 % of the original GPP is transferred to top carnivores.
B. Herbivores consume 18.75 % of NPP; 1.5 % of the original GPP is transferred to top carnivores.
C. Herbivores consume 20.00 % of NPP; 2 % of the original GPP is transferred to top carnivores.
D. Herbivores consume 30.00 % of NPP; 2.5 % of the original GPP is transferred to top carnivores.
Correct Answer
A
Correct Option:
Herbivores consume 22.22 % of NPP; 2 % of the original GPP is transferred to top carnivores.

About This Question

This is Waec Model Questions Vol1 2024 Biology Question 1. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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