As compared to daytime, the amount of carbon dioxide released by theplants during night is more because

During the night, the amount of carbon dioxide released by plants is higher compared to daytime. This is due to several factors:

1. Lack of sunlight: During the night, plants are unable to carry out photosynthesis, the process by which they convert carbon dioxide into oxygen. Without sunlight, plants cannot produce energy and therefore cannot utilize the carbon dioxide present in the atmosphere.

2. Respiration: Just like humans and animals, plants also undergo respiration, a process that involves the breakdown of sugars to release energy. During respiration, plants consume oxygen and produce carbon dioxide as a byproduct. Since photosynthesis is not taking place at night, the carbon dioxide produced through respiration accumulates in the plant cells and is released into the surrounding environment.

3. Stomatal opening: Stomata are small openings on the surface of plant leaves that allow for gas exchange. During the day, stomata open to take in carbon dioxide for photosynthesis. However, at night, stomata tend to remain open to facilitate the release of excess water vapor through transpiration. This open stomatal state also allows for the release of carbon dioxide from the plant.

Overall, the combination of reduced photosynthesis, increased respiration, and open stomata during the night leads to a higher release of carbon dioxide by plants compared to daytime.