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JAMB Biology 1979 Question 45

Question 45

Adaptation

Insects show considerable powers of water conservation. This is due to the fact that

  1. A.the chitinous cuticle is impregnated with tanned proteins
  2. B.nitrogenous waste is eliminated as urea
  3. C.chitin is impermeable to water
  4. D.the malpighian tubules are impermeable to water
  5. E.the cuticle is covered with wax.
Show the answer and explanation

Answer: E (the cuticle is covered with wax.)

Explanation

A thin layer of wax on the outside of the insect cuticle stops water evaporating from the body.