Fig. 1 shows cells from a plant tissue which have been mounted on a slide with distilled water and viewed using a microscope. [Figure 5.1] Fig. 2 shows cells taken from the same plant tissue when mounted on a slide with concentrated salt solution. [Figure 5.2]

1. (a)Explain the appearance of the cells in Fig. 2.[4]
2. (b)(i)Identify structures P and Q in Fig. 2. P Q[2]
3. (b)(ii)State the contents of location R in Fig. 2.[1]
4. (b)(iii)The concentrations of substances in structure Q are different from those in location R. Explain how the properties of structure P result in differences in concentrations of substances in Q and R.[3]

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