Fig. 2.1 is a photomicrograph of a stained transverse section through a plant root. You are not expected to be familiar with this specimen. [Fig. 2.1]

1. (a)(i)Use a sharp pencil for drawing. You are expected to draw the correct shape and proportions of the different tissues. Draw a large plan diagram of the region of the root section shown by the shaded area in [Fig. 2.2]. Use one ruled label line and label to identify the endodermis.[5]
2. (a)(ii)J1 is a stained transverse section through a root of a different type of plant. You are not expected to be familiar with this specimen. Observe the xylem vessel elements in the centre of the root section on J1. Select one large xylem vessel element and three adjacent cells. Each cell must touch at least one other cell. • Make a large drawing of this group of four cells. • Use one ruled label line and label to identify the lumen in one cell.[5]
3. (b)Identify observable similarities and differences between the root section in [Fig. 2.1] and the root section on J1. Record the observable similarities and differences in Table 2.1. Table 2.1 feature Fig. 2.1 J1 similarities differences[4]
4. (c)[Fig. 2.3] is a photomicrograph of the same root section as in [Fig. 2.1]. The line P-S shows the diameter of the whole root section. The line Q-R is the diameter of the vascular tissue. Calculate the percentage of the diameter of the whole root section that is vascular tissue. Show your working.[5]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.