Final answer:
The Calvin Cycle produces sugar in the form of G3P and components to regenerate RuBP. ATP and NADPH are utilized in the Calvin Cycle but are produced during the light-dependent reactions of photosynthesis.c) ATP and Sugar
Step-by-step explanation:
The Calvin Cycle, which is part of the photosynthetic process in plants, produces two main substances: sugar, in the form of glyceraldehyde-3-phosphate (G3P), and the molecule responsible for regenerating RuBP (ribulose bisphosphate), which is needed to continue the cycle.
While the Calvin Cycle itself does not produce ATP or NADPH, these molecules are produced during the light-dependent reactions of photosynthesis and are subsequently used as energy and reducing power in the Calvin Cycle. Therefore, the correct answer to which two substances the Calvin Cycle produces is sugar (specifically G3P) and the components needed to regenerate RuBP.