Every cell is surrounded by a thin membrane. what is the main function of this cell membrane? . a. to limit the size of the cell and keep the shape of the cell the same. b. to protect the cell from invasion by bacteria and viruses. c. to allow each cell to form connections with other cells. d. to separate the inside of the cell from the outside environment.

Option B

Explanation: The thin layer that forms the outer covering of the cell is known as the cell membrane. It is composed of the lipid bilayer which as embedded proteins.

This membrane is selectively permeable which means it allows only specific molecules to pass through them.

The main function of cell membrane is to protect the cell from the outer environment and by the invasion of harmful bacteria and viruses.