CAMBRIDGE 15 - LISTENING TEST 1PART 4Questions 31 – 40Complete the notes below.
Complete the notes below
Write
ONE WORD ONLY for each answer.
The Eucalyptus Tree in Australia
Importance
● it provides
31 and food for a wide range of species
● its leaves provide
32 which is used to make a disinfectant
Reasons for present decline in number
A) 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 species
B) 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