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4 marksRespiration

CSEC Biology · May/June 2008 · Paper 2 · Question 5(b)

The effect of smoke emission from factories on plant leaves is sometimes compared to the effect of cigarette smoke on human lungs. Suggest TWO reasons why this comparison is appropriate.

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Other parts of this question

  1. 5(a)(i)With the aid of a fully annotated diagram, explain how air reaches the lungs and oxygen is absorbed into the blood stream.[9 marks]
  2. 5(a)(ii)Suggest why it is important for human blood to have a specialised type of cell for oxygen absorption.[9 marks]
  3. 5(c)Many governments have passed legislation to reduce the amount of cigarette smoking in public. Explain why governments should consider it their responsibility…[2 marks]

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