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JAMB Biology 2006 Question 24

Question 24

Evolution

Use the diagram of the giraffes to answer: The change in the length of the necks of the giraffes shown was brought about by

Diagram for this question
  1. A.geographical isolation
  2. B.predation
  3. C.symbiosis
  4. D.natural selection
Show the answer and explanation

Answer: D (natural selection)

Explanation

Giraffes with longer necks could reach more leaves, so they survived and bred more. Over many generations this natural selection made long necks common.