The light-independent reactions of photosynthesis, also known as the Calvin cycle, take place in the stroma of the chloroplast.

Here's why:

* Chloroplasts: These are the organelles in plant cells where photosynthesis occurs.

* Stroma: The stroma is the fluid-filled space within the chloroplast, surrounding the thylakoid membranes.

* Thylakoid Membranes: This is where the light-dependent reactions occur, capturing light energy and converting it to chemical energy (ATP and NADPH).

* Calvin Cycle: The light-independent reactions, using the energy from ATP and NADPH, fix carbon dioxide from the atmosphere and convert it into sugars. This process happens within the stroma, where the necessary enzymes and molecules are located.

So, while the light-dependent reactions happen in the thylakoid membranes, the light-independent reactions occur in the stroma of the chloroplast.