Question

the calvin cycle takes place in the of the chloroplast.
need help? review these concept resources.

Explanation:

The Calvin cycle is a part of photosynthesis. In chloroplasts, the thylakoid membranes are involved in the light - dependent reactions, while the stroma (the fluid - filled space outside the thylakoid membranes within the chloroplast) is where the Calvin cycle (light - independent reactions) occurs. This is a fundamental concept in the study of plant biology (a sub - field of Natural Science, specifically Biology).

Answer:

stroma