Question

Both prokaryote and eukaryote cells have this structure. It helps maintain homeostasis and is a boundary between the inside of the cell and the outside environment. It is the

Answer 1

It is the membrane.

Step-by-step explanation:

The cell membrane surrounds the cytoplasm of a cell and physically separates the internal parts of the cell from the external environment. The membrane is also the gatekeeper, controlling what comes into and goes out of the cell.

Answer 2

Cell membrane would be the correct answer!