May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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28Plant Structure TransportMedium1 mark
The diagrams show plan diagrams of plant tissues. Which plan diagram shows a transverse section through a dicotyledenous stem?
Figure 28, diagram A: a circle labelled epidermis around its rim, enclosing an irregular star-shaped core labelled xylem, with four small circles dotted near the points of the star, one of which (near the top) is labelled phloem.
Figure 28, diagram B: a circle labelled epidermis around its rim, enclosing a ring of eight small teardrop-shaped units evenly spaced just inside the epidermis; one unit is labelled phloem and another, further round the ring, is labelled xylem.
Figure 28, diagrams C and D: each shows a block of close vertical parallel lines. In diagram C, three leader lines point (left to right, into the block) to lines labelled xylem, phloem and epidermis in that order. In diagram D, the same three leader lines instead label the lines, left to right, phloem, xylem and epidermis.