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Q86·GS Paper 1 · Prelims 2018

Prosopis juliflora Invasive Species

EnvironmentInvasive species and biodiversityFactual singleMediumStatic

Question

Why is a plant called Prosopis juliflora often mentioned in news?

Options

a

Its extract is widely used in cosmetics

b

It tends to reduce the biodiversity in the area in which it grows

Answer
c

Its extract is used in the synthesis of pesticides

d

None of the above

Explanation

Prosopis juliflora, commonly known as mesquite or vilayati babul, is frequently mentioned in environmental news because it is an invasive species that poses a significant threat to biodiversity. Originally introduced to India from Central America for afforestation and fodder, it has spread rapidly and aggressively in many parts of India, particularly in arid and semi-arid regions. It reduces biodiversity by outcompeting native vegetation, forming dense thickets that native species cannot penetrate, and depleting soil moisture. The plant is highly invasive and difficult to control, making it a conservation concern. Options A and C are incorrect as these are not the primary reasons Prosopis juliflora is discussed in news. It is not widely known for cosmetic or pesticide applications. The ecological threat it poses to native biodiversity is the main reason for media coverage.

Key insight: Prosopis juliflora is an invasive species that threatens native biodiversity by aggressively outcompeting indigenous vegetation across India's drylands.

Answer: (b).

Question details

Year

2018

Paper

GS Paper 1

Question

Q86

Subject

Environment

Sub-topic

Invasive species and biodiversity

Type

Factual single

Difficulty

Medium

Nature

Static

Source hint

Environmental Science, Invasive species in India

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