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Class 8 Science MCQs – Certification Test 493

Respiration and Breathing Trivia (Question 493) – Study App & e-Book Download

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MCQ 493: Human beings have specialized structure to carry out exchange of gases called:

  1. respiratory system
  2. digestion system
  3. nervous system
  4. circulatory system
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Respiration and Breathing Trivia App & e-Book – Class 8 Science Placement Tests

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