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Biology
Breathing and Exchange of Gases
CBSE
Class 11
Biology
Class 11 - Biology
Breathing and Exchange of Gases
MCQ
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1.
Incidence of emphysema-a respiratory disor-der is high in cigarette smokers. In such cases
a.
The bronchioles are found damaged
b.
The alveolar walls are found damaged
c.
The plasma membrane is found damaged
d.
The respiratory muscles are found dam-aged.
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