Final answer:
The Calvin cycle requires carbon dioxide, ATP, and NADPH, but does not require oxygen.
Step-by-step explanation:
The Calvin cycle requires all of the following except:
- carbon dioxide
- oxygen
- ATP
- NADPH
- water
The Calvin cycle is a part of photosynthesis, which is the process by which plants convert carbon dioxide and water into glucose.
It is a light-independent process that requires the chemical energy of ATP and the reducing power of NADPH generated from the light reactions. It does not require oxygen because it does not involve aerobic respiration or the production of oxygen.