State two functions of the cell membrane

The cell membrane allows substances to enter and leave the cell and gives the cell structure.

1. It allows communication with other cells.
2. It protects the cell.
3. It is flexible, yet provides structural support.
4. It is semipermeable, which allows smaller molecules like H2O and other substances to readily diffuse without the need up energy.
5. It prevents harmful substances from entering the cell.

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem