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5 marksNatural Selection

CAPE Biology Unit 1 · 2005 · Paper 2 · Question 9(b)(i)

A single species of brown cats in a homogeneous habitat was divided into two populations by an earthquake-formed canyon. Environmental pressures led to white cats in one population. The canyon filled, and the two populations now share the same habitat but cannot interbreed.

Identify the TYPE of speciation that occurred and indicate the mechanisms that contributed to it.

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Other parts of this question

  1. 9(a)(i)Describe the THREE types of natural selection.[6 marks]
  2. 9(a)(ii)Explain how environmental factors can act as forces of natural selection.[4 marks]
  3. 9(b)(ii)Identify the type of speciation that occurred and indicate the mechanisms that contributed to it.[5 marks]

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