Two major phases of photosynthesis are light dependent reaction and light independent reaction.
Explanation:
Two major phases of photosynthesis are light dependent reaction and light independent reaction. In light dependent reaction phase, light is needed for producing two molecules such as ATP and NADPH in the chloroplast where chlorophyll is present. While in light independent reaction, sugar molecules are produced from ATP and NADPH molecules which are formed in the first phase of photosynthesis.
