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7 marksDiseases

CSEC Biology · January 2011 · Paper 2 · Question 5(c)(i)

One way of controlling the spread of disease among crop plant, is to destroy the entire field, not just the few plants that are infected.

Suggest why this method of control is sometimes used.

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Other parts of this question

  1. 5(a)Identify ONE communicable disease and the pathogen that causes the disease.[2 marks]
  2. 5(b)(i)Describe how a vaccine works in building immunity.[6 marks]
  3. 5(b)(ii)Suggest why vaccines may NOT always have the desired effect in treating persons infected with disease.[6 marks]
  4. 5(c)(ii)Give TWO economic and TWO social consequences of widespread disease among crop plants.[7 marks]

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