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4 marksNutrition in Living Organisms

CSEC Biology · January 2009 · Paper 2 · Question 4(b)(i)

Sometimes plants are found in conditions where they are unable to make enough food. For EACH situation identified below, explain why the plants are unable to make enough food.

Tomato plants infested with a population of caterpillars

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Other parts of this question

  1. 4(a)With the aid of a balanced equation, describe the process by which green plants make their food.[6 marks]
  2. 4(b)(ii)Water plants rooted to the bottom of a pond in which there is a proliferation (sudden large population) of algae[1 mark]
  3. 4(c)(i)How does the use of fertilisers increase crop yield?[5 marks]
  4. 4(c)(ii)Some farmers choose to use chemical fertilisers, while others use natural fertilisers. Suggest TWO disadvantages of the use of chemical fertilisers.[1 mark]
  5. 4(c)(iii)Suggest ONE beneficial effect of organic fertilisers on soil.[1 mark]

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