passwella.
Menu

JAMB Biology 1991 Question 43

Question 43

Population Ecology

Use the graph (number of organisms against time for communities I and II): The above diagram represents a competitive interaction between organisms in communities I and II. Which of the following statements is CORRECT?

Diagram for this question
  1. A.The population of I was higher than II at the beginning of the experiment
  2. B.II was wiped out from the environment at the end of the experiment
  3. C.The population of II was always lower than that of I
  4. D.The population of I was lower at the end of the experiment than at the beginning
Show the answer and explanation

Answer: B (II was wiped out from the environment at the end of the experiment)

Explanation

Curve II rises, then falls to zero at the end, so II was eliminated by the competition; I rose and levelled off.