The stages of an investigation using plant tissue are listed below. • A freshly cut slice of plant tissue was rinsed in distilled water, dried and weighed. • This slice was placed in a solution with a water potential of –4 arbitrary units for thirty minutes. • The slice was removed from the solution, dried and reweighed. • The mass of the slice was the same as its original mass. Which conclusions can be drawn from this investigation? 1 The water potential of the cells of the plant tissue is –4 arbitrary units. 2 The cell sap of the plant tissue has a lower water potential than the surrounding solution. 3 There has been no net movement of water. 4 The cell wall of the plant tissue will not be in contact with the cell membrane.