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3 marksThe Uptake and Transport of Water and Minerals

CAPE Biology Unit 2 · 2015 · Paper 2 · Question 2(a)(ii)

Figure 2 displays a simple potometer setup used to investigate leafy shoot transpiration rates.

Outline the key steps for determining the rate of transpiration using the potometer shown in Figure 2. Note: Setting up apparatus details are not required.

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Other parts of this question

  1. 2(a)(i)On Figure 2, use an arrow labelled X to indicate the position where a leafy shoot is placed in the potometer.[1 mark]
  2. 2(b)With reference to FOUR structural features, explain how xylem tissue is designed to facilitate water transport. (Do not define transpiration or explain the…[4 marks]
  3. 2(c)(i)In the region highlighted by Box A on Figure 3, draw cellular details of the tissue layers.[4 marks]
  4. 2(c)(ii)With reference to the structural features in Figure 3, explain how an artery is able to withstand high blood pressure pumped from the heart.[2 marks]
  5. 2(c)(iii)State ONE major difference that would be observed if a plan drawing of a vein's cross section were examined.[1 mark]

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