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2 marksNutrition in Living Organisms

CSEC Biology · January 2007 · Paper 2 · Question 1(e)(i)

Suggest TWO ways in which the growth of the corn plant would be different over the 36 days, if the soil in which it grew were deficient in nitrogen and magnesium.

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Other parts of this question

  1. 1(a)(i)On the grid provided in Figure 1, draw a graph of the results shown in Table 1.[7 marks]
  2. 1(a)(ii)Using information from the graph you constructed on page 2, estimate the height of the corn plant on Days 5 and 13.[2 marks]
  3. 1(b)Describe the pattern of growth shown by the plant over the 36-day period.[3 marks]
  4. 1(c)(i)What is the likely source of food for the corn plant during the first 6 days?[1 mark]
  5. 1(c)(ii)Give TWO uses of the food obtained by the corn plant during the first 6 days.[2 marks]
  6. 1(d)(i)Describe the method for obtaining dry mass, including the materials and apparatus necessary.[2 marks]
  7. 1(d)(ii)State ONE step to be taken to ensure the accuracy of the results when using this method.[1 mark]
  8. 1(d)(iii)Give ONE disadvantage of using dry mass to determine growth.[1 mark]
  9. 1(e)(ii)Explain how a lack of EACH of the following elements may result in the differences suggested in (e)(i) above: Nitrogen; Magnesium.[2 marks]
  10. 1(f)(i)The corn seed germinated after a heavy shower of rain, although it had been in the soil for a long period of time. What changes occurred in the seed for…[3 marks]
  11. 1(f)(ii)Apart from water, state TWO conditions necessary for germination.[2 marks]

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