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General Studies (Paper 1) from UPSC CSE 2013 Prelims
Subject: General Studies (Paper 1) Science and Technology Union Public Service Commission — Civil Services Examination Last updated May 9, 2026
UPSC CSE Prelims 2013 General Studies (Paper 1)

Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to

1. resist drought and increase absorptive area
2. tolerate extremes of pH
3. resist disease infestation 

Select the correct answer using the codes given below. 

Answer & Explanation

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Correct Answer: Option D — 1, 2 and 3
• Correct Answer: (d) 1, 2 and 3
• Explanation: Mycorrhiza is a symbiotic fungus that expands the root network, filters out toxins, and acts as a biological shield against soil-borne pathogens.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.

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UPSC CSE 2013 Prelims

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Exam UPSC CSE
Stage Prelims
Year 2013
Subject General Studies (Paper 1)
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