Correct option: B
- Endosmois is the process by which water from the surroundings gets into the cells as the water content outside the cell is higher.
- As a result, the cell swells up.
- Exosmois is the process in which water molecules move out from the cell as its content is higher inside the cell.
- As a result, the cell shrinks.
- And if the water content on either side remains the same there is no change in the shape of the cell.
- The concentration of water molecules determines the movement of water.
Hence, a cell will swell up if "the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell".
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