Which structure of the cell controls what goes in and comes out of the cell?
which structure is a strong layer around plant cells?

Plasma membrane.

Cell wall.

Explanation:

Plasma membrane is a film composed of phospholipids, which delimits the cell and prevents the internal environment of the cell from coming into contact with the external environment of the cell. However, the plasma membrane allows the two media to have a certain contact, since some substances can enter and leave the cell, depending on the need and maintaining balance between the internal and external environment.

The cell wall, in turn, is a rigid layer composed of cellulose, with less permeability than the cell membrane, which is established around plant cells, allowing these cells to have greater rigidity and resistance to plant cells.

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