Chirkut.বাংলা

MCQ practice · SSC Biology Board questions · Chapter 7: Exchange of Gases

Mymensingh Board 2024

Z contains:

  1. i. ring-shaped cartilage
  2. ii. ciliated cells
  3. iii. alveoli

Think it through first, then pick an option.

  1. a i and ii
  2. b i and iii
  3. c ii and iii
  4. d i, ii and iii
Answer and explanation

Correct answer: a i and ii

i is true: the wall of the trachea is built of ring-like cartilage. ii is true: the lining of the trachea has ciliated, fine-haired cells. iii is false: alveoli are in the lungs at the tips of the bronchioles, not in the trachea.

Why the other options are wrong

  • b i and iii: ii is true: the lining of the trachea has ciliated, fine-haired cells. iii is false: alveoli are in the lungs at the tips of the bronchioles, not in the trachea.
  • c ii and iii: i is true: the wall of the trachea is built of ring-like cartilage. iii is false: alveoli are in the lungs at the tips of the bronchioles, not in the trachea.
  • d i, ii and iii: iii is false: alveoli are in the lungs at the tips of the bronchioles, not in the trachea.