4 3 Mosquitoes transmit a number of diseases, including malaria. The photograph shows a mosquito, Anopheles gambiae. This mosquito transmits malaria. Source: © Sinclair Stammers / Science photo library (a) (i) State the genus of this mosquito. (1) ...................................................................................................................................................................................................................................................................................... (ii) Mosquitoes belong to the class Insecta. Some of the insects in this class are subdivided into a group called Diptera. What is the name of the classification group that includes Diptera? . (1) A Family B Genus C Order D Phylum (iii) Which of the following organisms causes the symptoms of malaria? . (1) A Anopheles gambiae B Plasmodium falciparum C Puccinia graminis D Salmonella enterica 5 Turn over (b) From 2010 to 2015 there was a 29% decrease in the number of deaths from malaria. This was due to prevention and control measures. (i) Explain one implication of a named method of controlling malaria. 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(ii) In 2015, the number of deaths from malaria was 429 000. Calculate the number of deaths from malaria in 2010. (2) Answer .............................................................. (c) In 2015, the number of cases of malaria was 211 million. This increased to 216 million cases in 2016. Give the change in the number of cases of malaria in standard form. (1) Answer .............................................................. 6 (d) Scientists are researching new methods of controlling malaria. One group used a procedure called gene drive. This procedure resulted in female mosquitoes that could not bite or could not lay eggs. One of the scientists said: ‘It will still be at least 5 to 10 years before we consider testing any mosquitoes with gene drive, but now we have some encouraging proof that we’re on the right path.’ Explain why this group are sharing the results of their research. 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(Total for Question 3 = 10 marks)