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3 marksEnergy Flow and Nutrient Cycling

CAPE Biology Unit 2 · 2013 · Paper 2 · Question 1(b)(ii)

Figure 2 illustrates a general model for nutrient cycling showing four element reservoirs (A, B, C, D) and processes transferring nutrients between them.

Name the processes represented by arrows 1, 2 and 3 in Figure 2 involved in transferring nutrients between reservoirs.

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Other parts of this question

  1. 1(a)(i)State the region of the cell where glycolysis takes place.[1 mark]
  2. 1(a)(ii)Describe what occurs at each of the stages labelled 1, 2, 3 and 4 in Figure 1.[2 marks]
  3. 1(a)(iii)Suggest the significance of the pathway shown in Figure 1.[2 marks]
  4. 1(b)(i)a)Identify which reservoir contains organic materials that are available as nutrients.[1 mark]
  5. 1(b)(i)b)Identify which reservoir contains inorganic materials that are unavailable as nutrients.[1 mark]
  6. 1(b)(iii)Using an arrow and the letter M, indicate on Figure 2 where the activity of mycorrhizal fungi dissolving minerals fits into the nutrient cycling model.[1 mark]
  7. 1(c)(i)Use labelled double-headed arrows (↔) directly on the graph in Figure 3 to indicate the region where: a) light is a limiting factor b) other factors become…[2 marks]
  8. 1(c)(ii)Explain the significance of points D and E on the axes of the graph in Figure 3.[2 marks]

More practice: the rest of this paper · more Energy Flow and Nutrient Cycling questions · all CAPE Biology Unit 2 past papers