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Q97·GS Paper 1 · Prelims 2014

Mycorrhizal biotechnology applications

EnvironmentBiodiversity and BioremediationStatement-basedMediumStatic

Question

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

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

    resist drought and increase absorptive area

  2. 2.

    tolerate extremes of pH

  3. 3.

    resist disease infestation

Options

a

1 only

b

2 and 3 only

c

1 and 3 only

d

1, 2 and 3

Answer

Explanation

All three statements are correct regarding mycorrhizal benefits. Statement 1: Mycorrhizal fungi extend the root system and increase nutrient and water absorption capacity, helping plants resist drought. Statement 2: Mycorrhizae help plants tolerate acidic and alkaline soils by buffering pH extremes through their hyphal networks. Statement 3: Mycorrhizal associations improve plant health and disease resistance by enhancing nutrient uptake and producing antimicrobial compounds. Mycorrhizae are widely used in phytoremediation and ecological restoration of degraded lands, mining sites, and polluted areas because they provide these multiple benefits simultaneously. > Mycorrhizal Functions: Mycorrhizae improve water-nutrient uptake, pH tolerance, and disease resistance, making them invaluable for ecological restoration and bioremediation. Answer: (d).

Question details

Year

2014

Paper

GS Paper 1

Question

Q97

Subject

Environment

Sub-topic

Biodiversity and Bioremediation

Type

Statement-based

Difficulty

Medium

Nature

Static

Source hint

NCERT Biology - Microbial Associations

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