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JAMB Biology 2000 Question 30

Question 30

Population Ecology

I. High birth rate and high immigration rate II. Low birth rate and high immigration rate III. Low mortality rate and low emigration rate IV. High mortality rate and high emigration rate. Which combination of the above can cause rapid over -crowding in climax biotic communities and human settlements?

  1. A.II and III
  2. B.I and III
  3. C.I and IV
  4. D.I and II.
Show the answer and explanation

Answer: B (I and III)

Explanation

Many arrivals (high births and immigration) and few losses (low deaths and emigration) make a population grow fastest.