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🌱 Environment & EcologyUPSC 2011Sustainable Development

Biodiversity forms the basis for human existence in the following ways:1. Soil formation2. Prevention of soil erosion3. Recycling of waste4. Pollination of cropsSelect the correct answer using the codes given below:

a1, 2 and 3 only
b2, 3 and 4 only
c1 and 4 only
d1, 2, 3 and 4
✓ Correct answer: d) 1, 2, 3 and 4
ExplanationBiodiversity provides a number of natural services for human beings which are listed in the table below: Ecosystem ServicesProtection of water resourcesSoil formation and protectionNutrient storage and recyclingPollution breakdown and absorptionContribution to climate stabilityMaintenance of ecosystemsRecovery from unpredictable events Biological ServicesFoodMedicinal resources and pharmaceutical drugsWood productsOrnamental plantsPollination of cropsBreeding stocksDiversity in genes, species and ecosystems Social Ser- vicesResearch, education and monitoringRecreation and tourismCultural values UPSC GS Paper-I PYQs 480 41

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