WAEC Biology 2014 Theory — Question 20

Question 20 of 23 from the West African Examinations Council (WAEC) Biology 2014 Theory paper, with the correct answer and a full explanation.

6(e). State two factors each which result in: (i) increase; (ii) decrease, in population density.

Model answer

(i) Increase: immigration into the area; high birth rate (natality). (ii) Decrease: emigration from the area; high death rate (mortality) — e.g. due to disease, predation, or famine.

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