ICSE /Class 9
Biology MCQ Based On Respiratory system
Our free online Biology test quiz for Class 9, ICSE will assist you to improve your Biology skills on every concept in a fun interactive way.
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ICSE Class 9 Biology Respiratory system
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Muscles that regulate the functioning of lungs
Hypo means low concentration
Can happen due to allergy and pollution
combination of both gases is 18%
opening in exoskeleton of insects
Rise in conc of gas human expires
concerned with Anemia
Respiration
single celled organisms
Asphyxiation
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