CSEC Biology · January 2013 · Paper 2 · Question 4(c)
Explain the effect of cutting and burning forests on the operation of the carbon cycle, and on the environment.
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- 4(a)(i)Name the structures responsible for gaseous exchange in humans and in fish.[2 marks]
- 4(a)(ii)Identify THREE features that the structures named in (i) above have in common.[3 marks]
- 4(b)(i)Draw and annotate a diagram to show how oxygen and carbon dioxide are exchanged across the respiratory surface of a human.[3 marks]
- 4(b)(ii)a)Name the process by which gases are exchanged in plants.[1 mark]
- 4(b)(ii)b)Explain why in plants there is a difference in the percentage of the respiratory gases exchanged during the day compared with the percentage exchanged during…[3 marks]
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