P1 is a slide of a stained transverse section through a plant root.

1. (a)(i)Draw a large plan diagram of the region of the root on slide P1 indicated by the shaded area in [Figure 2.1]. Use a sharp pencil. draw this region [Figure 2.1] Use one ruled label line and label to identify the xylem.[5]
2. (a)(ii)Observe the cells in the centre of the root on slide P1. Select a group of four adjacent cells. Each cell must touch at least two other cells. • Make a large drawing of this group of four cells. • Use one ruled label line and label to identify the cell wall of one cell.[5]
3. (b)(i)[Figure 2.2] shows a photomicrograph of a transverse section through a root. This root is different to the root on slide P1. You are not expected to be familiar with this root section. [Figure 2.2] Identify three observable differences, other than colour, between the root in [Figure 2.2] and the root on slide P1. Record these three observable differences in an appropriate table.[4]
4. (b)(ii)[Figure 2.3] is a photomicrograph of the same root section that is shown in [Figure 2.2]. [Figure 2.3] Use the scale bar on [Figure 2.3] to calculate the magnification of the photomicrograph and the actual diameter of the root section identified by the line X-Y. Show your working and use appropriate units. magnification = x .......................................................................... actual diameter = ..........................................................................[5]

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