Excretion is the removal of

  1. all water from the body
  2. undigested food
  3. toxic materials and waste products of metabolism
  4. food from the mouth
Answer

C) toxic materials and waste products of metabolism

Definition of excretion. O Level Biology · Topic 13 Excretion · 13.1 Excretion

Biology MCQ · More O Level Biology: Excretion MCQs · Practise