Answer:
Osmosis and vesicle transport
Explanation:
Osmosis is the movement of water from a low concentrated solution (hypotonic) to a higher concentrated solution (hypertonic) through a semipermeable membrane. The cells regulate the movement of water by regulating the amount of osmotically active molecules in their protoplasm. This way they can influence the flow of water into or out of the cells
For larger unicellular cells such as amoeba, where osmosis alone would not be effective, they use vesicle transport. Excess water in the cell accumulates in a vessicle that transports and expels it outside the cell.
