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WAEC Biology 2012 Question 10

Question 10

Transport in Animals

The table shows the blood composition of four individuals.
Individual I: plasma normal, red blood cells normal, white blood cells high, platelets normal.
Individual II: plasma normal, red blood cells normal, white blood cells normal, platelets normal.
Individual III: plasma normal, red blood cells normal, white blood cells low, platelets normal.
Individual IV: plasma normal, red blood cells normal, white blood cells normal, platelets low.
Which of the individuals is likely to be suffering from haemophilia?

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

Answer: D (IV)

Explanation

Haemophilia is a failure of blood clotting; platelets help blood clot, and only individual IV has a low platelet count.