What is photosynthesis?
The synthesis of complex organic compounds from simple organic compounds like water and carbondioxide by green plants in the presence of chlorophyll using sunlight is called photosynthesis.
6CO2+ 6H2O CHO+6O
What is photorespiration?
When during hot, arid days, stomata opens only a little, enough carbon dioxide is not taken, so rubisco takes up oxygen and uses it in the Calvin cycle instead of carbon dioxide, this process of light dependent uptake of carbon dioxide and release of oxygen is called photorespiration.