UPSC CSE Prelims
Land Degradation Previous Year Questions (PYQs)
Practice solved questions for Land Degradation with detailed step-by-step solutions, key insights, and trend analysis for UPSC CSE PRELIMS.
Solved Previous Year Questions
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Mycorrhizal Biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to -
- Resist drought and increase absorptive area
- Tolerate extremes of pH
- Resist disease infestation
Select the correct answer using the codes given below:
Detailed Explanation:
✅ Statement 1 – Correct: Mycorrhizal fungi form symbiotic associations with plant roots, greatly increasing the effective absorptive surface area (fungal hyphae extend beyond roots) and improving water uptake, enabling plants to resist drought stress.
✅ Statement 2 – Correct: Mycorrhizae help plants tolerate extreme pH conditions (both acidic and alkaline soils) by facilitating nutrient acquisition even when pH levels reduce nutrient availability.
✅ Statement 3 – Correct: Mycorrhizae provide bioprotection against disease infestation by competing with soil-borne pathogens, producing antimicrobial compounds, and enhancing plant immune responses.
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