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3 marksTransport in the Phloem

CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2 · Question 2(c)(ii)

Figure 4 shows an electron micrograph of a plant vascular structure.

State how EACH of the structures X, Y, and Z is adapted to its function.

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Other parts of this question

  1. 2(a)(i)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…[2 marks]
  2. 2(a)(ii)Account for the difference in diameter of the xylem between the trunk of the tree and the shallow roots.[2 marks]
  3. 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]
  4. 2(b)(i)Identify the THREE main tissue types labelled 1, 2, and 3 shown in Figure 3.[1 mark]
  5. 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]
  6. 2(b)(iii)The cell labelled V has been magnified 300 times. Calculate the actual diameter of this cell.[1 mark]
  7. 2(c)(i)Identify the structures labelled X, Y, and Z in Figure 4.[1 mark]

More practice: the rest of this paper · more Transport in the Phloem questions · all CAPE Biology Unit 2 past papers