4 The space between the vacuole and cell wall must be occupied by the sucrose solution (and, of course, the cell membrane and cytoplasm bounding the cell sap). 5 The cell membrane, tonoplast and cytoplasm separate the solution and the cell sap. 6 The cell membrane, the cytoplasm, the tonoplast or some combination of these must be selectively permeable. 7 If the cell wall were selectively permeable, the loss of water to the sucrose solution would distort the cell wall and no space would appear between it and the vacuole. 8 If all the cells in a plant were plasmolysed, the unsupported structures would be limp and wilting and the plant would eventually die. 9 (a) When the sucrose solution was replaced by water, the cells recovered from the plasmolysed condition and the vacuole expanded to fill the cell once again. (b) The cell sap now contains a stronger solution than the surrounding fluid and absorbs water - through the selectively permeable cytoplasm. 10 A plant with its cells turgid would have firm tissues, an erect stem and expanded leaves. Inference/Conclusion:
4 The space between the vacuole and cell wall must be occupied by the sucrose solution (and, of course, the cell membrane and cytoplasm bounding the cell sap). 5 The cell membrane, tonoplast and cytoplasm separate the solution and the cell sap. 6 The cell membrane, the cytoplasm, the tonoplast or some combination of these must be selectively permeable. 7 If the cell wall were selectively permeable, the loss of water to the sucrose solution would distort the cell wall and no space would appear between it and the vacuole. 8 If all the cells in a plant were plasmolysed, the unsupported structures would be limp and wilting and the plant would eventually die. 9 (a) When the sucrose solution was replaced by water, the cells recovered from the plasmolysed condition and the vacuole expanded to fill the cell once again. (b) The cell sap now contains a stronger solution than the surrounding fluid and absorbs water - through the selectively permeable cytoplasm. 10 A plant with its cells turgid would have firm tissues, an erect stem and expanded leaves. Inference/Conclusion: