While they do have a rigid cell wall outside the membrane, the cell membrane is still present and plays a crucial role in regulating what enters and exits the cell.

Here's a breakdown:

* Cell wall: A tough, rigid outer layer that provides structure and support to the plant cell.

* Cell membrane: A thin, flexible layer that surrounds the cytoplasm of the plant cell. It controls the movement of substances into and out of the cell, maintaining a stable internal environment.

Think of it like this:

* The cell wall is the brick wall of a house, providing structural support.

* The cell membrane is the door and windows, controlling what goes in and out.

Both are essential for the proper functioning of the plant cell.