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Question No. 107Interactive Test Mode
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Q107. The scientific view is that the increase in global temperature should not exceed 2°C above the pre-industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world? 1. The terrestrial biosphere tends toward a net carbon source. 2. Widespread coral mortality will occur. 3. All the global wetlands will permanently disappear. 4. Cultivation of cereals will not be possible anywhere in the world. Select the correct answer using the code given below:

The scientific view is that the increase in global temperature should not exceed 2°C above the pre-industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world?

  1. The terrestrial biosphere tends toward a net carbon source.
  2. Widespread coral mortality will occur.
  3. All the global wetlands will permanently disappear.
  4. Cultivation of cereals will not be possible anywhere in the world. Select the correct answer using the code given below:
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2014 • Environment and Ecology

Correct Answer: Option (B) — 1 and 2 only

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: Beyond 3°C of warming, terrestrial ecosystems (like forests and peatlands) face severe dieback and increased respiration, transitioning from net carbon sinks to net carbon sources.

Statement 2 is correct: Coral reefs are highly temperature-sensitive; warming beyond 2°C leads to catastrophic bleaching and widespread mortality worldwide.

Statements 3 and 4 are incorrect: Extreme qualifiers like 'all global wetlands permanently disappear' and cereal cultivation being impossible 'anywhere in the world' are scientifically implausible. High-latitude and temperate regions would still support certain cereal crops.

Elimination Heuristic & Exam Approach

Statements containing extreme words like 'All' or 'anywhere in the world' are almost always scientifically incorrect in ecological assessments.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2014 (Q107)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Climate Change & Global Warming
Official Answer KeyOption (B) — 1 and 2 only

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Frequently Asked Questions — UPSC Prelims 2014 Q107

What is the official answer for UPSC Prelims 2014 GS Paper I Question 107 (Environment and Ecology)?

The official UPSC answer key for this 2014 Environment and Ecology (Climate Change & Global Warming) question is Option (B): "1 and 2 only". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2014 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Climate Change & Global Warming". You can explore all repeated questions from Climate Change & Global Warming in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Climate Change & Global Warming UPSC Prelims question using option elimination?

Statements containing extreme words like 'All' or 'anywhere in the world' are almost always scientifically incorrect in ecological assessments.

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