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UPSC-CSE-2018-->View question

On the basis of the above passage, the following assumptions have been made:

 A research team examined a long – term owl roost. Owls prey on small mammals and the excreted remains of those meals that accumulate over the time, provide us an insight into the composition and structure of small mammals over the past millennia. The research suggested that when the earth went through a period of rapid warming about 13,000 years ago, the small mammal community was stable and resilient. But, from the last quarter of the nineteenth century, human-made changes to the environment had caused an enormous drop in biomass and energy flow. This dramatic decline in energy floe means modern ecosystem are not adapting as easily as they did in the past.

On the basis of the above passage, the following assumptions have been made:

1.      Global warming is a frequent occurring natural phenomenon.

2.      The impending global warming will not adversely affect small mammals.

3.      Humans are responsible for the loss of the Earth’s natural resilience.

  Which of the above assumptions is/are valid?

(a)    1 and 2 only

(b)   3 only

(c)    2 and 3 only

(d)   1,2 and 3




Asked On2019-06-25 15:07:40 by:gokilapriya

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Answer: Option 2

Assumption 1 cannot be made on the basis of this para, as only one example is cited. So options (a) and (d) are ruled out. Assumption 2 is clearly wrong, as the reverse is cited. So option (c) is ruled out. Hence, (b) is correct. Assumption 3 is mentioned in the para.

Answerd on:2021-12-24 Answerd By:Raj-Gupta

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