Class 10 Biology Competitive Exam MCQs – Practice Test 5 (Chapter 3)

Gaseous Exchange MCQs with Answers PDF Download – Test 5

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Learn Class 10 Biology Learning App Download with MCQ: "In nostrils, the substance which moistens and keep the incoming air warm is classified as"; with answers: larynx, bronchi, mucous, and glottis. Solve Gaseous Exchange in Humans MCQ Questions, download Google e-Book (Free Chapter) to strengthen learning outcomes online.

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MCQ 21: In nostrils, the substance which moistens and keep the incoming air warm is classified as:

bronchi
larynx
mucous
glottis

MCQ 22: During inspiration the diaphragm is:

contracted
dome shaped
relaxed
raised

MCQ 23: The main cause of lung cancer is:

pollutants
smoking
cough
fever

MCQ 24: The most common cause of cancer-related deaths is:

kidney cancer
liver cancer
lung cancer
stomach cancer

MCQ 25: The cluster of pouches opened from alveolar ducts is called:

pulmonary cells
alveoli
bronchus
epithelial cells

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