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2 marksFood Chains, Food Webs, and Decomposers

CSEC Biology · January 2006 · Paper 2 · Question 1(b)(i)

Suggest ONE conclusion that may be drawn from the information presented in Table 1 and your graph.

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Other parts of this question

  1. 1(a)(i)Use the data in Table 1 to construct a graph showing the percentage decay of fresh green leaves at the temperatures investigated.[4 marks]
  2. 1(a)(ii)Identify TWO precautions each group should take in setting up their investigations.[2 marks]
  3. 1(b)(ii)Give ONE explanation for the conclusion arrived at in (b)(i) above.[2 marks]
  4. 1(b)(iii)One club member suggested that at a temperature of 80°C no decay would have occurred. Do you support this view? Explain your answer.[2 marks]
  5. 1(c)One of the goals of Green Minds is to promote the use of natural fertilizers by gardeners in the school's neighbourhood. Identify FOUR points about fertilisers…[4 marks]
  6. 1(d)(i)Describe how you would prepare the materials and apparatus for investigation illustrated in Figures 1.1 and 1.2.[3 marks]
  7. 1(d)(ii)Suggest ONE limitation to the method you described in d (i).[1 mark]
  8. 1(d)(iii)How far did the bubble move in 20 minutes?[1 mark]
  9. 1(d)(iv)Estimate the transpiration rate of the plant in the investigation.[2 marks]
  10. 1(d)(v)Suggest ONE reason why your estimated rate is not necessarily accurate.[2 marks]
  11. 1(d)(vi)Identify ONE external factor that might affect the movement of the bubble.[1 mark]
  12. 1(e)(i)Describe how the club members could determine the presence of TWO named nutrients in the yam-bean fruit.[2 marks]
  13. 1(e)(ii)State the expected food test results if the nutrients you chose in (e) (i) are present in the fruit.[2 marks]

More practice: the rest of this paper · more Food Chains, Food Webs, and Decomposers questions · all CSEC Biology past papers