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6 marksNatural Selection

CAPE Biology Unit 1 · 2007 · Paper 2 · Question 9(a)(i)

Define the term 'environment', and explain the influence of ONE physical factor and ONE biotic factor, on the environment.

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  1. 9(a)(ii)Define the term 'evolution', and explain the difference between the terms 'allopatric' and 'sympatric'.[1 mark]
  2. 9(b)Give FOUR reasons for the importance of maintaining biodiversity on earth.[4 marks]
  3. 9(c)(i)Stabilizing selection[8 marks]
  4. 9(c)(ii)Directional selection[1 mark]
  5. 9(d)"Disruptive selection is closely associated with speciation." Comment on this statement.[2 marks]

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