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2 marksNatural Selection

CAPE Biology Unit 1 · May/June 2022 · Paper 2 · Question 2(b)(i)

Concepts and observations related to Charles Darwin's theory of natural selection.

Define the term 'natural selection'.

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  1. 2(a)(i)In the appropriate spaces provided in Figure 3, make detailed sketches to illustrate the TWO key stages of mitosis in the cell that are NOT shown (Stage II and…[2 marks]
  2. 2(a)(ii)State the name of the missing stages: Stage II, Stage III, Stage IV.[3 marks]
  3. 2(a)(iii)Explain how the process of mitosis ensures that each daughter nucleus receives a full set of chromosomes.[3 marks]
  4. 2(b)(ii)List THREE of Darwin's observations concerning natural selection.[3 marks]
  5. 2(c)(i)On the grid provided on page 15, plot a line graph to represent the data in Table 1 for Pond A, Pond B and Pond C.[5 marks]
  6. 2(c)(ii)Using the information given on page 14, discuss how the results of John Endler's experiment, as it relates to variation in the number of spots in male guppies,…[6 marks]

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