Concept:Osmosis causes water to move from a dilute solution into a more concentrated solution.
Explanation:The cell has an osmotic potential equivalent to a
3% salt solution.
Solution I is
1% salt solution, which is lower in concentration than the cell contents.
Therefore, solution I is a hypotonic solution.
Water will enter the cell by osmosis, increasing the internal volume and osmotic (turgor) pressure.
Solution II is
3%, which is isotonic, so there is no net water movement.
Solutions III and IV are
6% and
10%, respectively, which are hypertonic and cause water to leave the cell.
Hence, only solution I causes an increase in osmotic pressure within the cell.
Answer:A. I