Biology 9700 · AS & A Level · Transport mechanisms
Transport mechanisms — practice question
Fig. 4.1 shows an electron micrograph of a transverse section of a plant stem. The vessels can be seen clearly.
(a)[2]
Calculate the magnification shown in the electron micrograph in Fig. 4.1. Show all steps and round your answer to the nearest 100.
(b)[3]
Describe the ways in which the structure of xylem vessels is adapted for their function.
(c)[5]
Describe and explain the movement of water from the xylem vessels in the leaves to the atmosphere around the leaves of the plant.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Magnification correctly calculated at about $\times 400$” …