Chapter 9: Class 8 Science Exam Tests
Class 8 Science MCQs - Chapter 9
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MCQ 36: Blood collects oxygen from inhaled air and gives off carbon dioxide in the
MCQ 37: Respiration which takes place in the absence of oxygen is called
MCQ 38: There is higher concentration of oxygen in
MCQ 39: The distance which is travelled by an average red blood cell is equal to
MCQ 40: Heart is made of specialized
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