GS1 2019 Q4 10 marks 150 words Geography and Environment

UPSC Mains 2019 GS1 Q4 — Geography and Environment

Assess the impact of global warming on the coral life system with examples. (Answer in 150 words)

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Question Decoded — examiner's intent

Directive verbs
Assess
Scope keywords
impact of global warmingcoral life systemexamples
Implicit sub-parts
  • Mechanism of bleaching (symbiotic breakdown between polyps and zooxanthellae due to thermal stress)
  • Secondary impacts beyond temperature (ocean acidification and rising sea levels affecting photosynthesis)
  • Consequences for the broader marine ecosystem and coastal protection dependent on corals
  • Specific geographical case studies showing current degradation status
Common pitfalls
  • Vague focus on general pollution or plastic waste instead of specific 'global warming' drivers
  • Failing to mention the symbiotic relationship (Zooxanthellae), which is the biological core of the question
  • Treating corals as plants rather than a complex 'life system' involving calcium carbonate structures and animal polyps
  • Omitting real-world examples like the Great Barrier Reef or Lakshadweep, making the answer purely theoretical
Dimensions required
Biological/PhysiologicalEcological/BiodiversitySocio-economic (Fisheries and Tourism)Geographical/Spatial
Marks allocation hint

Allocate 30 words to the introduction and the biological mechanism of bleaching. Use 80 words to assess multi-dimensional impacts (reproduction, diversity loss, and coastal shield degradation). Dedicate the remaining 40 words to specific examples and a forward-looking conclusion on resilience.

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