CAPE Biology Unit 2 · May/June 2019 · Paper 2 · Question 3(c)
Discuss FOUR major economic impacts of diseases spread by mosquitoes.
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- 3(a)(i)Assuming that epidemiologic week 1 (not shown on the graph) was the first week of January, in which month was the first confirmed case of a Zika virus…[1 mark]
- 3(a)(ii)List FOUR other observations from the data provided in Figure 3. Your statements can refer to the epidemiologic week (instead of month).[4 marks]
- 3(a)(iii)Explain the mechanisms by which viruses can be transmitted from an infected to an uninfected person by mosquitoes.[6 marks]
- 3(b)(i)With the aid of a labelled graph showing blood antibody concentration over time after vaccination, explain THREE ways in which vaccinations work to reduce the…[9 marks]
- 3(b)(ii)Distinguish between 'natural active immunity' and 'artificial active immunity'.[2 marks]
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