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WAEC Biology 2007 Question 22

Question 22

Homeostasis

Protection of the body cells of mammals against ultra-violet rays of the sun is brought about by

  1. A.keratin
  2. B.melanin
  3. C.sebum
  4. D.scales
Show the answer and explanation

Answer: B (melanin)

Explanation

Melanin, the dark pigment in the skin, absorbs ultra-violet rays and shields deeper cells.