Malaria is a potentially fatal infectious disease that is spread to humans by infected mosquitoes. Scientists investigated the behaviour of 20 mosquitoes for an hour in each of the four containers shown. Aim: To determine if wearing clean clothing reduces the transmission of malaria. Assume infected mosquitoes that land on clothing transmit malaria. --- 3 WORK AREA LINES (style=lined) --- --- 6 WORK AREA LINES (style=lined) ---
Experiment
Container A
Container B
Container C
Container D
1
15
7
12
5
2
19
5
9
3
3
12
4
14
6
4
18
6
13
4
5
19
6
10
3
Justify a suitable conclusion for this investigation. (3 marks)
BIOLOGY, M7 2018 HSC 17 MC
The diagram shows the life cycle of the malaria parasite, Plasmodium sp. Five stages in this life cycle are numbered on the diagram.
To prevent malaria, the following four strategies have been used:
-
- taking anti-malarial drugs
- spraying swamps with insecticides
- using mosquito nets over beds
- administering a malaria vaccine.
Which row in the table shows the stage in the life cycle in which each of these strategies would be most effective?
BIOLOGY, M7 2017 HSC 22a
For each type of disease in the following table, name a specific disease and its cause. (2 marks)
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BIOLOGY, M7 2019 HSC 32
Use the following data to answer parts (a) and (b).
Dengue fever and malaria are examples of infectious diseases transmitted between humans by mosquitoes. Dengue fever is caused by a virus transmitted by mosquitoes of the genus Aedes. Malaria is caused by a single-celled organism transmitted by mosquitoes of the genus Anopheles.
The following data provide information about the global incidence of these two diseases over time.
- Based on the data provided, identify trends in the global disease burden for both malaria and dengue fever. (3 marks)
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- Analyse factors that could have contributed to the change in global distribution of both dengue fever and malaria over the last 100 years. Support your answer with reference to the data provided. (7 marks)
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BIOLOGY, M7 2022 HSC 30
Malaria is a disease transmitted by a mosquito vector. There has been no effective vaccine developed.
Refer to the maps below to answer Question 30.
Discuss possible reasons for the differences in the distribution of malaria and its vector. Include detailed reference to Map 1 and Map 2. (7 marks)
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