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: -1. Sansevieria Zeylanica, Snake Plant. Considered highly efficient in oxygen production, Snake Plants are unique for their ability to produce oxygen and absorb carbon dioxide even at night. In an air sealed room, these plants are capable of producing enough oxygen to breathe normally.

Detailed explanation-4: -But during night time, plants perform only respiration and no photosynthesis (since absence of sunlight). Thus concentration of CO2 released is higher during night time.

Detailed explanation-5: -During daylight hours, plants take in carbon dioxide and release oxygen through photosynthesis, and at night only about half that carbon is then released through respiration. However, plants still remain a net carbon sink, meaning they absorb more than they emit.