| 1 |
In which of the following gaseous exchange occur through stomata? |
- A. The leaves and young stems
- B. Wood stems and nature roots.
- C. Young roots
- D. The aquatic plants
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| 2 |
Every year "World Day" is celebrated on: |
- A. 31 May
- B. 30 May
- C. 31 March
- D. 21 March
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| 3 |
During exercise or other hard physical works the breathing rate may increase up to. |
- A. 30-40 times per minute
- B. 50-60 times per minute
- C. 60-70 times per minute
- D. 70-80 times per minute
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| 4 |
The uncontrolled cell divisions in lungs tissue is called: |
- A. bronchitis
- B. emphysema
- C. cancer
- D. Asthma
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| 5 |
Glottis is a narrow opening at the floor of: |
- A. Nasal cavity
- B. Nostril
- C. Pharynx
- D. Antibiotics
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| 6 |
How many bronchi are there in the air passageway? |
- A. One
- B. Two
- C. Many
- D. None of these
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| 7 |
What happens during Exhalation? |
- A. Ribs muscles relax
- B. Diaphragm become dome shaped
- C. Pressure on lungs increased
- D. All of these
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| 8 |
How many lobs are present in right lung? |
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| 9 |
Cartilage is absent in: |
- A. larynx
- B. trachea
- C. bronchi
- D. bronchioles
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| 10 |
Total chemicals in tobacco smoke are: |
- A. 1000
- B. 2000
- C. 3000
- D. 4000
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