Q1.) To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight.
Q2.) It is a process in which light energy converts into chemical energy. This process takes place in the presence of light. As dark reaction does not require light it doesn't meant it occurs at night it only requires products of light reaction like ATP and NADPH.
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Answer:
Q1.) To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight.
Q2.) It is a process in which light energy converts into chemical energy. This process takes place in the presence of light. As dark reaction does not require light it doesn't meant it occurs at night it only requires products of light reaction like ATP and NADPH.