Biology 5090 · O Level · Leaf structure

Leaf structure — practice question

Fig. 5.1 shows a plant growing in soil that has been well watered.
(a)[4]

The plant was grasped by the stem and pulled out of the ground, then replanted in a different area of well-watered soil. It was noticed that it stayed wilted for several days after replanting before returning to its original appearance. Suggest an explanation for this observation.

(b)[1]

Photosynthesis occurs in the leaves of the plant. Complete the equation below for photosynthesis using words or symbols.

(c(i))[3]

State the names of the parts labelled P, Q and R in Fig. 5.2.

(c(ii))[2]

Suggest how the upper surface of the same leaf would look different from the lower surface shown in Fig. 5.2 when examined with a microscope. Explain why this difference occurs.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: Root hairs were removed / roots were damaged

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