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.
ICSE Class 9 Biology Respiratory system
Hypo means low concentration
protective layer around lungs is known as pleura
Rise in conc of gas human expires
Liberation of energy
set of rings are involved
opening in exoskeleton of insects
Can happen due to allergy and pollution
single celled organisms
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