Question

which of the following is a function of the cell membrane? maintaining the cells integrity controlling the passage of substances in and out of the cell facilitating communication between cells and their environment all of the above

Explanation:

The cell membrane has multiple functions: it maintains the cell's integrity by providing a stable structure, controls the passage of substances (selective permeability), and facilitates communication (e.g., through receptors). So all these are functions of the cell membrane.

Answer:

All of the above (the option in the red box)