NEET BIOLOGY

Detailed explanation-1: -Therefore, the gas expelled is oxygen. But at night, due to the absence of sunlight, photosynthesis stops, and carbon dioxide formed during respiration is released. Therefore, all plants give out O2 during the day and CO2 for the entire time.

Detailed explanation-2: -At night, photosynthesis stops but respiration continues, so there is a net consumption of oxygen. The compensation point is where the net change in oxygen is zero. The rate of respiration is fairly constant, while photosynthesis is light-dependent.

Detailed explanation-3: -Plants release oxygen during the day in the presence of natural light through the process of photosynthesis. While at night, the plants uptake oxygen and release carbon dioxide, which is called respiration.

Detailed explanation-4: -Plants excrete more carbon dioxide at night compared to during the day because they cannot do photosynthesis at night. Photosynthesis requires sunlight. So, during the day plants take in carbon dioxide and water and use sunlight to do photosynthesis to make oxygen and glucose.

Detailed explanation-5: -Plants release carbon dioxide as waste products by the process of respiration of plants during the night time.