Why photosynthesis and respiration in plants cannot take place together??
Photosynthesis and respiration do take place together in plants.
But in day, the rate of photosynthesis is more than respiration and oxygen is released.
In night, the rate of respiration is more than photosynthesis and carbon dioxide is released.
In low light intensity, the rate of respiration= the rate of photosynthesis and there is no net evolution of gases.