Waec Model Questions Vol1 2018 Agricultural Science Question 1

Practice objective / multiple choice question 1 from the 2018 Waec Model Questions Vol1 Agricultural Science examination.

Waec Model Questions Vol1 2018 Agricultural Science Objective / Multiple Choice Hard Difficulty
Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • AGRICULTURAL_SCIENCE • objective

A fish population in a lake follows the logistic growth model dP/dt = rP(1 - P/K), where r is the intrinsic growth rate and K the carrying capacity. At present the population is stable at 4,000 fish with an annual harvest of 1,000 fish. The intrinsic rate r is 0.5 per year. (a) Determine the carrying capacity K of the fish stock. (b) If a new policy increases the annual harvest by 25% while r remains unchanged, will the population increase, remain stable, or decline? State the expected trend.

Answer Options

A. Carrying capacity K = 10000 fish; the population will remain stable.
Correct Answer B. Carrying capacity K = 8000 fish; the population will decline.
C. Carrying capacity K = 6000 fish; the population will increase.
D. Carrying capacity K = 8000 fish; the population will increase.
Correct Answer
B
Correct Option:
Carrying capacity K = 8000 fish; the population will decline.

About This Question

This is Waec Model Questions Vol1 2018 Agricultural Science Question 1. It is one of the objective questions from the 2018 Waec Model Questions Vol1 Agricultural Science examination.

Difficulty level: Hard .

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