AP BIOLOGY

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: -At night, or in the absence of light, photosynthesis in plants stops, and respiration is the dominant process. The plant uses energy from the glucose it produced for growth and other metabolic processes.

Detailed explanation-3: -Adding plants to interior spaces can increase oxygen levels.At night, photosynthesis ceases, and plants typically respire like humans, absorbing oxygen and releasing carbon dioxide.

Detailed explanation-4: -Plants give out carbon dioxide not only at night but during the day too.It happens because of the process of respiration in which plants take in oxygen and give out carbon dioxide.As soon as the sun rises another process called photosynthesis starts, in which carbon dioxide is taken in and oxygen is given out.

Detailed explanation-5: -Since photosynthesis requires sunlight, it occurs only in the daytime, which thus means that plants give out oxygen during the day. Plants give out carbon dioxide during respiration, which takes place during the day as well as at night.