Question

if respiration takes place in plants during night then why does not the level of CO2 rise in the atmosphere during night??

Answer 1

In respiration to convert food to energy, plants use oxygen, andcarbon dioxide is released. Respiration and photosynthesis bothoccur during the day. However, at night only respiration occurswhich consumes oxygen. This is what causes oxygen levels to decrease throughout the night.

Answer 2

because at night as plants inhale O2 and exhale CO2 same human beings inhale CO2 mor then O2 at night
may be its rigjt