DENDROLOGY

Detailed explanation-1: -At night, photosynthesis does not occur hence they take in oxygen and give out carbon dioxide. Therefore, it is said that during the daytime, plants take in carbon dioxide and give out oxygen, and during the night it is vice-versa.

Detailed explanation-2: -You are correct, plants do release carbon dioxide (CO2) at night, although they also release CO2 during the day. This is a part of the process of respiration!

Detailed explanation-3: -These plants do release some oxygen at night when the stomata open and the oxygen can escape. Carbon dioxide is not released during photosynthesis, but small amounts of that gas are emitted both day and night as a by-product of cellular respiration.

Detailed explanation-4: -Interestingly, this process also uses oxygen in the same way as humans use oxygen for breathing. Fortunately, photosynthesis also uses CO2 and produces 10 times more oxygen, so plants create much more oxygen than they use. And that’s a good thing.

Detailed explanation-5: -At night, plants release carbon dioxide instead of taking it in due to the absence of sunlight and the continuation of metabolic processes. Temperature and humidity also play a role in the release of carbon dioxide at night.