How are the dark reactions that occur in plants dependent on the light reaction

The DARK REACTION happen in the stroma of the chloroplasts. This is also known as the Calvin Cycle. Since these processes can only happen in the chloroplast (a chlorophyll filled plastid in green plants), photosynthesis can only happen in green plants
The point is that they do not require sunlight to complete their process.

Light reaction occurs in the grana of chloroplast. The chlorophyll absorbs the light energy. Hence the chlorophyll is called a photosystem or pigment system

In my own word cell technology can  lead to advances in the understanding of diseases mechanism and transmission because diseases is very bad

Interacting group of various species in a common location. for example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.