Page 133 - 3 ADIM DENEME SINAVI YDT KİTAP 2.ADIM

YDT • İngilizce 2. ADIM • 5. DENEME

39. According to the passage, scientists ----.
38. - 40. soruları aşağıdaki parçaya göre cevaplayınız.
A) estimate that the current rate of extinction is
Extinction is a natural phenomenon. As life changes, around 1,000 times higher than the natural
extinction rate
some species become extinct completely. Today,
up to 98 per cent of all species that have ever lived B) are of the opinion that human-caused global
on Earth are not alive. Nevertheless, it cannot be warming is the primary factor in the extinction of
denied that humans have been greatly accelerating species
th
this process, particularly since the mid-20 century. C) advise people to take precautionary measures in
Scientists are of the opinion that human activities have order to prevent mass extinction in the near future
been causing the extinction of species by hundreds to D) claim that habitat destruction has a negative
perhaps thousands of times higher than the normal influence on at least half of the species
extinction rate. There has also been a decrease in the E) say the loss of natural systems could increase
genetic diversity that exists within species, particularly human vulnerability to ecological surprises in the
in domesticated animals and crops. A major factor next few decades
contributing to biodiversity loss is habitat destruction
and fragmentation as land is cleared for timber or to
make room for agriculture, settlements, and other
human activities. Other factors include global warming,
pollution, overfishing, overhunting, and the introduction
of invasive species into new environments. A significant
number of scientists believe that habitat destruction will
drive one-quarter to one-half of all species inexorably
to extinction in the next few decades. If that happens,
extinction rates would be a thousand times higher than
st
the normal extinction rate by the middle of the 21
century.

38. According to the passage, extinction of species 40. The main purpose of this passage is to ----.
----.
A) explain which human activities cause harm to
A) can have a domino effect on the food chain nature
B) is prevalent among domesticated animals and B) estimate how habitat destruction will affect
crops humans
C) is entirely caused by human activities C) illustrate the reasons for the normal extinction
D) threatens more than 90 per cent of organisms rate
E) is a natural process that takes place over time D) inform readers about the loss of biodiversity
E) show the importance of genetic diversity

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