Answer:
D. Cells have a plasma mebrane to separate the inside of the cell from it´s environment
Explanation:
The plasma membrane is a lipid bilayer that delimits the entire cell. It is a structure formed by two sheets of phospholipids, glycolipids and proteins that surround, limit the shape and contribute to maintaining the balance between the inside and outside of the cells. Regulates the entry and exit of many substances between the cytoplasm and the extracellular environment.
The basic function of the plasma membrane is to keep the intracellular environment differentiated from the environment. This allows the cell to divide the different organelles into sections and thus protect the chemical reactions that occur in each.
It´s main characteristic is it´s selective permeability, which allows to select the molecules that must enter and leave the cell, that way the intracellular medium is stable.
