Why is the calvin cycle considered a dark reaction? a. it occurs only at night. b. it requires an absence of light. c. it turns the plant dark green. d. it can proceed in the dark.

Answer is D. It can proceed in the dark. Took the test.

The correct answer would be d. It can proceed in the dark.

Calvin cycle or Benson-Calvin cycle refers to the set of chemical reactions involved in fixing the carbon from carbon dioxide into the sugar or glucose.

It generally occurs in the stroma of the chloroplast and does not require the input of solar energy that is, it can occur in dark. It is the reason that it is also termed as the dark reaction.

However, it depends on the products of light reaction which are NADPH and ATP.

carbon atoms, hydrogen, oxygen, and nitrogen.

because photosynthesis could not occur (apex)