Final answer:
The Calvin cycle is a process in photosynthesis that converts carbon dioxide into glucose using ATP and NADPH. The Krebs cycle is a part of cellular respiration that produces ATP and NADH through glucose breakdown.
Step-by-step explanation:
The Calvin cycle is part of the light-independent reactions of photosynthesis. It uses ATP and NADPH to convert carbon dioxide into glucose. On the other hand, the Krebs cycle is part of cellular respiration. It produces ATP and NADH through the breakdown of glucose.