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2 marksThe Uptake and Transport of Water and Minerals

CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2 · Question 2(a)(i)

A study comparing the mean xylem vessel diameters in tree trunks, shallow roots, and deep roots in Juniper (J) and Quercus (Q), shown in Figure 2.

Complete the table of xylem diameters for Juniper and Quercus and calculate the diameter of the trunk xylem as a percentage of the deep root xylem for both species.

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Other parts of this question

  1. 2(a)(ii)Account for the difference in diameter of the xylem between the trunk of the tree and the shallow roots.[2 marks]
  2. 2(a)(iii)State TWO factors, other than transpiration pull from the leaves, that would account for water movement in the xylem of the roots.[2 marks]
  3. 2(b)(i)Identify the THREE main tissue types labelled 1, 2, and 3 shown in Figure 3.[1 mark]
  4. 2(b)(ii)Four cells are marked with an 'X'. Draw these four cells and all cells between them in correct proportion at a magnification of x2.[3 marks]
  5. 2(b)(iii)The cell labelled V has been magnified 300 times. Calculate the actual diameter of this cell.[1 mark]
  6. 2(c)(i)Identify the structures labelled X, Y, and Z in Figure 4.[1 mark]
  7. 2(c)(ii)State how EACH of the structures X, Y, and Z is adapted to its function.[3 marks]

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