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Class 10 Biology Learning Guide: Certification Test 250

Gaseous Exchange in Humans MCQs App & e-Book: MCQ 250

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MCQ: 250

Human breathing rate during hard physical work is

  1. 10-15 times per minute
  2. 16-20 times per minute
  3. 30-40 times per minute
  4. 25-30 times per minute
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Gaseous Exchange in Humans Learning Guide: Class 10 Biology App & eBook MCQs

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