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JAMB Biology 2006 Question 44

Question 44

Ecosystem and Ecological Factors

Use the graph to answer: Which of the following can be deduced from the distribution?

Diagram for this question
  1. A.Species II is found only in locations where it rains all year round
  2. B.Species III increases in number as rainfall increases
  3. C.The distribution of species IV is not dependent on rainfall
  4. D.Species I thrives under conditions of moderate to high rainfall
Show the answer and explanation

Answer: D (Species I thrives under conditions of moderate to high rainfall)

Explanation

Species I is scarce at low rainfall but rises above 200 per km² once rainfall is moderate and stays high as rainfall increases. Species III falls as rainfall rises, and species IV is found only within a narrow rainfall range.