Waec Model Questions Vol1 2020 Biology Question 24

Practice objective / multiple choice question 24 from the 2020 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2020 Biology Objective / Multiple Choice Hard Difficulty
Question 24 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • objective

Two terrestrial ecosystems, A and B, have different net primary productivity (NPP). Ecosystem A has an NPP of 2000 g C m⁻² yr⁻¹, while ecosystem B has an NPP of 1500 g C m⁻² yr⁻¹. Energy (or biomass) transfer efficiency between successive trophic levels is 10 %. Herbivores consume 70 % of the available plant biomass, and carnivores consume 25 % of the herbivore biomass. Calculate the amount of carnivore biomass (in g C m⁻² yr⁻¹) that can be supported in each ecosystem and state which ecosystem supports the larger carnivore biomass.

Answer Options

A. Ecosystem A: 14 g C m⁻² yr⁻¹; Ecosystem B: 10.5 g C m⁻² yr⁻¹; Ecosystem A supports the larger carnivore biomass
B. Ecosystem A: 3.5 g C m⁻² yr⁻¹; Ecosystem B: 2.6 g C m⁻² yr⁻¹; Ecosystem B supports the larger carnivore biomass
Correct Answer C. Ecosystem A: 3.5 g C m⁻² yr⁻¹; Ecosystem B: 2.6 g C m⁻² yr⁻¹; Ecosystem A supports the larger carnivore biomass
D. Ecosystem A: 7.0 g C m⁻² yr⁻¹; Ecosystem B: 5.3 g C m⁻² yr⁻¹; Ecosystem A supports the larger carnivore biomass
Correct Answer
C
Correct Option:
Ecosystem A: 3.5 g C m⁻² yr⁻¹; Ecosystem B: 2.6 g C m⁻² yr⁻¹; Ecosystem A supports the larger carnivore biomass

About This Question

This is Waec Model Questions Vol1 2020 Biology Question 24. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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