A bacterium possesses an outer loose sheath, a rigid layer that maintains shape and an innermost selectively permeable m
The bacterial envelope consists of the outermost glycocalyx, followed by the cell wall and then the plasma membrane. Although the layers perform distinct functions, they operate together as a protective unit.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Eukaryotic Cell - Cell Wall and Cell Membrane - Fluid Mosaic Model