A tissue composed of plasmolysed plant cells was put into distilled water. The graph shows how
the mean cell volume changes with time
What is the cause of the plateau at X
1 water potential in the plant cell has become more negative
2 cells have become fully turgid
3 no net movement of water into cells
A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only