The inner membrane of mitochondria consists of many folds. what is the purpose of this membrane

The purpose of this membrane is to maintain homeostasis in the body by regulating what enters and leaves the body. It is also part of the large process of movement of materials in your body.

To increase the surface area.

Explanation:

Mitochondria is known as the energy house of the cell. The formation of ATP occurs in the mitochondria in the firm of aerobic respiration. Mitochondria is the semi autonomous organelle that contains its own DNA.

The mitochondria contains the outer and inner membrane. The inner membrane is folded into finger like projections known as cristae. These helps in increasing the surface area of the inner membrane and increases the rate of electron transport chain.

Thus, the answer is to  increase the surface area.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.