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Environment Previous Year QuestionsIAS Previous Year QuestionsStaapana - March 2019Sthaapana - March 2019 - Week 4

IAS Previous Year Environment Questions – Lecture – 4 – STHAAPNA Series

Sthapna - Static MCQs for GS - Subject -Environment Day - 4

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Consider the following statements : [2011]

  1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
  2. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as

compared to the higher altitudes.

Which of the statements given above is/are correct?

(a)1 only

(b)2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

 

Biodiversity forms the basis for human existence in the following ways : [2011]

  1. Soil formation
  2. Prevention of soil erosion
  3. Recycling of waste
  4. Pollination of crops

Select the correct answer using the codes given below

(a)1,2 and 3 only

(b)2, 3 and 4 only

(c) 1 and 4 only

(d) 1, 2, 3 and 4 only

 

The Himalayan range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon ? [2011]

(a) It has a high rainfall that supports luxuriant vegetative growth.

(b) It is a confluence of different bio-geographical zones.

(c) Exotic and invasive species have not been introduced in this region.

(d) It has less human interference.

 

Three of the following criteria have contributed to the recognition of Western Ghats, Sri Lanka and Indo-Burma regions as hotspots of biodiversity : [2011]

  1. Species richness
  2. Vegetation density
  3. Endemism
  4. Ethno-botanical importance
  5. Threat perception
  6. Adaption of flora and fauna to warm and humid conditions

Which three of the above are correct criteria in this context?

(a)1, 2 and 6

(b)2, 4 and 6

(c) 1, 3 and 5

(d) 3, 4 and 6

 

Which of the following can be threats to the biodiversity of a geographical area? [2012]

  1. Global warming
  2. Fragmentation of habitat
  3. Invasion of alien species
  4. Promotion of vegetarianism

Select the correct answer using the codes given below :

(a)1, 2 and 3 only

(b)2 and 3 only

(c) 1 and 4 only

(d) 1, 2, 3 and 4

 

The term “sixth mass extinction/sixth extinction” is often mentioned in the news in the context of the discussion of [2018]

a.Widespread monoculture practices in agriculture and large-scale commercial farming with indiscriminate use of chemicals in many parts of the world that may result in the loss of good native ecosystems.

b.Fears of a possible collision of a meteorite with the Earth in the near future in the manner it happened 65 million years ago that caused the mass extinction of many species including those of dinosaurs.

c.Large scale cultivation of genetically modified crops in many parts of the world and promoting their cultivation in other parts of the world which may cause the disappearance of good native crop plants and the loss of food biodiversity.

d.Mankind’s over-exploitation/misuse of natural resources, fragmentation/loss of natural habitats, destruction of ecosystems, pollution and global climate change.

 

Why is a plant called Prosopis juliflora often mentioned in news ? (2018)

a.Its extract is widely used in cosmetics.

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

c.Its extract is used in the synthesis of pesticides.

d.None of the above

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