IMMUNOLOGY

Detailed explanation-1: -So, plants take in carbon dioxide from the atmosphere for preparing food. 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! First though, you should know that during the day, when there is enough sunlight, plants undertake a process called photosynthesis.

Detailed explanation-3: -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.

Detailed explanation-4: -These desert plants take in carbon dioxide during the night time or when the temperature is cooler because during the day the stomata are closed to prevent transpiration or water loss.