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1 markRespiration

CSEC Biology · January 2007 · Paper 2 · Question 5(a)(ii)

Figure 5 is a labelled diagram of part of the breathing apparatus of fish.

Identify ONE feature observed in Figure 5 that allows the filaments to function efficiently.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 5(a)(i)Water passes over the gill rakers before passing over the filaments. Suggest the function of the gill rakers.[1 mark]
  2. 5(a)(iii)State ONE OTHER characteristic of the filaments that helps in their function.[1 mark]
  3. 5(b)(i)Identify TWO structures in the breathing apparatus of humans that have similar functions to the parts of the gills illustrated in Figure 5.[4 marks]
  4. 5(c)State THREE ways in which the lungs of a smoker may be affected by the smoking habit.[3 marks]
  5. 5(d)(i)Identify TWO OTHER human activities that result in pollution.[2 marks]
  6. 5(d)(ii)Identify TWO effects of polluted waterways on aquatic life.[2 marks]

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