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2 marksRespiration

CSEC Biology · January 2018 · Paper 2 · Question 3(a)(ii)

Figure 2 is a diagram of an enlarged section of the human lung.

State the function of EACH of the parts labelled II and IV in Figure 2.

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Other parts of this question

  1. 3(a)(i)Name the structures labelled I, II, III and IV in Figure 2.[4 marks]
  2. 3(b)(i)State TWO ways in which the appearance of the lung of a smoker differs from that of a non-smoker.[2 marks]
  3. 3(b)(ii)Suggest TWO benefits of placing a ban on the smoking of cigarettes in public places.[2 marks]
  4. 3(b)(iii)Name the addictive component in cigarettes and suggest ONE negative impact of drug addiction.[2 marks]
  5. 3(c)The alveolus has a function similar to that of a dicotyledonous leaf. State THREE ways by which a dicotyledonous leaf is adapted to carry out this function.[3 marks]

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