67th B.P.S.C. (Pre) Examination, 2022
It is advised not to sleep under a tree at night because trees—
aRelease a lesser amount of oxygen
bRelease harmful gases at night
cRelease carbon dioxide✓ Correct
dRelease carbon monoxide
eNone of the above/more than one of the above
Explanation
During the day, in the presence of sunlight, plants absorb carbon dioxide and release oxygen during respiration. But at night, exactly the opposite happens: they absorb oxygen and release carbon dioxide. Thus, at night the amount of carbon dioxide increases under trees and a feeling of suffocation is felt; therefore, one should not sleep under a tree at night.
general-science