Animal cells are bathed in an isotonic fluid, and plant and bacteria cells have a
cell wall. What does this protect the cell
membrane from?

Plant cell has cell wall.It protects the cell membarane from wheather,wind.It need cell wall because it is not moving.

a wall located the outside of cell membrane provides the cell support and protection against mechanical stress or damage from osmotic rapture and lysis...

Explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

hammurabi rulers

good lesson