Question

why do plants respire only at night

Answer 1

As you know during the daytime the plants perform the process of photosynthesis due to the presence of Sunlight and gives oxygen as a byproduct in the process of photosynthesis during the night there is no sunlight and due to which the plant cannot perform the process of photosynthesis and that's why they they respire at night

Answer 2

Question :
Answer : During the night, plants consume oxygen but they don't release any. All plants and the animals on earth engage in a process called reapiration.
Respiration combines oxygen and the food created during photosynthesis to produce usable energy. One of the byproducts of reapiration is carbon dioxide.
.. Hope you got ti.