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2 marksNutrition in Living Organisms

CSEC Biology · May/June 2007 · Paper 2 · Question 1(a)(ii)

Students want to test if all leaves on a tree photosynthesize at the same rate. They select leaves from a tree similar to Figure 1, which shows leaves exposed to different light levels.

Write an aim for the investigation.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(a)(i)Describe how the students may investigate the hypothesis. Include in your description any apparatus/materials required.[6 marks]
  2. 1(a)(iii)Suggest ONE precaution the students should take in their investigation.[1 mark]
  3. 1(b)(i)On the graph paper on page 5, construct a line graph to show the effect of carbon dioxide concentration on the rate of photosynthesis.[6 marks]
  4. 1(b)(ii)Using Table 1 and the graph you constructed, determine the concentration at which carbon dioxide is a limiting factor at high and low light intensities…[2 marks]
  5. 1(c)(i)Using arrows only, illustrate on Figure 2 the pathway by which the products of photosynthesis arrive at storage cells or organs.[2 marks]
  6. 1(c)(ii)What is the name of the transporting tissue?[1 mark]
  7. 1(c)(iii)Apart from carbon dioxide and sunlight, identify ONE OTHER environmental factor that is required for photosynthesis.[1 mark]
  8. 1(d)(i)Breast milk is described as best for babies. Using the information in Table 2, give TWO reasons why this description is appropriate.[4 marks]
  9. 1(d)(ii)Apart from nutrients, suggest ONE OTHER value of breast milk.[1 mark]
  10. 1(e)Minerals are required for good nutrition in plants. Name TWO minerals used by plants and state the function of EACH mineral named.[4 marks]

More practice: the rest of this paper · more Nutrition in Living Organisms questions · all CSEC Biology past papers