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3 marksNatural Selection

CAPE Biology Unit 1 · 2003 · Paper 2 · Question 3(b)

With reference to the graphs drawn on page 10, comment on the effect of birth-weight on mortality.

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Other parts of this question

  1. 3(a)(i)On Figure 3, complete the histogram of the typical birth-weight of babies over a 10-year period. (Note that portions of this histogram have been pre-drawn.)[5 marks]
  2. 3(a)(ii)Also on Figure 3, construct a graph of the percentage mortality of babies in relation to birth-weight. (Use a best-fit graph line.)[5 marks]
  3. 3(c)What effect would the observations you made in (b) have on the gene pool controlling the birth-weight of the foetus?[1 mark]
  4. 3(d)What is this type of selection called?[1 mark]

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