JAMB - Biology (1978 - No. 32)
A spirogyra cell placed was placed in solution X after 1 minute the cell has been plasmolysed, solution X was
Tap water
a very strong sugar solution
a weak sugar solution
a very weak salt solution
distilled water
Explication
When a plant cell is put in highly concentrated solution, it increases the pressure on the cell. Hence, plasmolysis holds in a highly concentrated solution.