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GS Paper IUPSC Prelims 2011
Biodiversity & Conservation
Question No. 40Interactive Test Mode
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Q40. Biodiversity forms the basis for human existence in the following ways: 1. Soil formation 2. Prevention of soil erosion 3. Recycling of waste 4. Pollination of crops Select the correct answer using the codes given below:

Biodiversity forms the basis for human existence in the following ways:

  1. Soil formation
  2. Prevention of soil erosion
  3. Recycling of waste
  4. Pollination of crops Select the correct answer using the codes given below:
Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2011 • Environment and Ecology

Correct Answer: Option (D) — 1, 2, 3 and 4

Concept & Option Breakdown

Standard Reference Verified

Biodiversity underpins vital ecosystem services essential for human survival:

  • Regulating and Supporting services: Soil formation and nutrient cycling through microorganisms, prevention of soil erosion through plant root networks, recycling of organic waste through decomposers, and pollination of crops by insects, birds, and bats.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2011 (Q40)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Biodiversity & Conservation
Official Answer KeyOption (D) — 1, 2, 3 and 4

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Frequently Asked Questions — UPSC Prelims 2011 Q40

What is the official answer for UPSC Prelims 2011 GS Paper I Question 40 (Environment and Ecology)?

The official UPSC answer key for this 2011 Environment and Ecology (Biodiversity & Conservation) question is Option (D): "1, 2, 3 and 4". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2011 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Biodiversity & Conservation". You can explore all repeated questions from Biodiversity & Conservation 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 Biodiversity & Conservation UPSC Prelims question using option elimination?

To solve Biodiversity & Conservation questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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Previous QuestionConsider the following statements: 1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes. 2. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes. Which of the statements given above is/are correct?
Next QuestionWesterlies in the southern hemisphere are stronger and persistent than in the northern hemisphere. Why? 1. Southern hemisphere has less landmass as compared to the northern hemisphere. 2. Coriolis force is higher in southern hemisphere as compared to northern hemisphere Which of the statements given above is/are correct?