Question

A person sleeping under a tree during night feels lethargic when he wakes up in the morning. What could be the possible reason?

• A. He has inhaled more carbon dioxide given out by trees.
• B. He has inhaled more oxygen given out by trees.
• C. He has produced more lactic acid because it was cold outside.
• D. He has exhaled more oxygen than he should have.

Answer 1

The correct option is A

He has inhaled more carbon dioxide given out by trees.

Plants opt for respiration during night due to which they give out lot of carbon dioxide during that time. A person sleeping under trees during night inhales more carbon dioxide and deprives his body of oxygen. This leads to less energy production and thus the person feels lethargic after he wakes up in the morning.