TEST 233Cambridge IELTS 15 · Questions 31–40The Eucalyptus Tree in AustraliaComplete the notes below.Write ONE WORD ONLY for each answer.The Eucalyptus Tree in AustraliaImportance–it provides 31 and food for a wide range of species–its leaves provide 32 which is used to make a disinfectantReasons for present decline in numberA) Diseases(i) ‘Mundulla Yellows’–Cause–lime used for making 33 was absorbed–trees were unable to take in necessary iron through their roots(ii) ‘Bell-miner Associated Die-back’–Cause–34 feed on eucalyptus leaves–they secrete a substance containing sugar–bell-miner birds are attracted by this and keep away other speciesB) BushfiresWilliam Jackson's theory:–high-frequency bushfires have impact on vegetation, resulting in the growth of 35–mid-frequency bushfires result in the growth of eucalyptus forests, because they:–make more 36 available to the trees–maintain the quality of the 37–low-frequency bushfires result in the growth of 38,‘ rainforest’, which is:–a 39 Ecosystem–an ideal environment for the 40 of the bell-miner