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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
Which animal has unpaired lungs:
  • A
    Monkey
  • B
    Whale
  • C
    Some frogs
  • D
    Some snakes
✓

Answer

  1. Some snakes

Explanation:

Some snakes have only one bronchus and the right lung. In mammalian lungs each alveolar duct ends in a passage, called atrium, which leads into a number of rounded alveolar sacs. Each alveolar sac is studded with a large number of air sacs or alveoli. Alveoli are the sites of respiration.

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