Question

which statement about the cell membrane is true? it contains cellulose and sugars that are involved in communication. it is present in animal cells only. it is rigid and elastic for supporting the cells shape. it prevents harmful substances from entering a cell.

Explanation:

Cell membrane is a selectively - permeable barrier. It regulates the movement of substances in and out of the cell, preventing harmful substances from entering while allowing necessary nutrients and molecules to pass through. Cellulose is in plant cell walls, not cell membranes. Cell membranes are in both animal and plant cells. They are flexible, not rigid and elastic for cell - shape support (cell walls do that in plants).

Answer:

It prevents harmful substances from entering a cell.