Respuesta :
The cell membranes physically distinguishes an external environment from the internal one.
What is cell membrane and its characteristics?
The cell membrane is also known as the plasma membrane. It is found in all the cells and distinguishes the internal of the cell from the external surrounding. The membrane of the cell comprises a lipid bilayer, which is semipermeable.
The cell membrane monitors the conduction of substances exiting and entering the cell. The cell membrane also provides a constant environment within the cell, and that membrane exhibit many kinds of activities.
Thus, the correct answer is option b.
Find out more information about cell membrane here:
https://brainly.com/question/19360972
