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2 marksNutrition in Living Organisms

CSEC Biology · January 2016 · Paper 2 · Question 3(a)(ii)

Figure 2 is a diagram of guard cells seen in a dicotyledonous leaf from a plant watered 12 hours before and placed in sunny conditions.

State ONE function of EACH of the structures labelled I and IV.

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Other parts of this question

  1. 3(a)(i)Identify the structures labelled I, II, III, IV and V in Figure 2. Write your answers in the spaces provided in Figure 2.[5 marks]
  2. 3(b)In the space below, draw an annotated diagram to show the appearance of the guard cells after the plant is watered in the early morning. Use an arrow to show…[6 marks]
  3. 3(c)Explain why the behaviour of an animal cell would differ from that of a plant guard cell when they are placed in dilute solutions.[2 marks]

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