UPSC Prelims : Environment and Ecology Analysis part 4

Pre 2012

  1. Consider the following kinds of organisms :
  1. Bacteria
  2. Fungi
  3. Flowering plants

Some species of which of the above kinds of organisms are employed as biopesticides?

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

All of then can be depending on the properties of specific species

  1. Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct?
  1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
  2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.
  3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.

Select the correct answer using the codes given below :

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

  • 2nd only, red flag, pause and think, why not other gases. Nitrogen is also part of biomass
  • 3rd not in internal combustible engines but new engines are supporting

3. Consider the following areas:

  1. Bandipur
  2. Bhitarkanika
  3. Manas
  4. Sunderbans

Which of the above are Tiger Reserves?

(a) 1 and 2 only

(b) 1, 3 and 4 only

(c) 2, 3 and 4 only

(d) l, 2, 3 and 4

Bhutarkanika is a wetland famous for birds

4. In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

(a) Biosphere Reserves

(b) National Parks

(c) Wetlands declared under Ramsar Convention

(d) Wildlife Sanctuaries

  • Simple, ncert, titbit
  • No human interference allowed in national parks

5. Consider the following kinds of organisms :

  1. Bat
  2. Bee
  3. Bird

Which of the above is/are pollinating agent/agents?

(a) 1 and 2 only

(b) 2 only

(c) 1 and 3 only

(d) 1, 2 and 3

All. Birds/ fliers do pollinate

6. Which one of the following groups of animals belongs to the category of endangered species?

(a) Great Indian Bustard, Musk Deer, Red Panda and Asiatic Wild Ass

(b) Kashmir Stag, Cheetal, Blue Bull and Great Indian Bustard

(c) Snow Leopard, Swamp Deer, Rhesus Monkey and Saras (Crane)

(d) Lion-tailed Macaque, Blue Bull, Hanuman Langur and Cheetal

  • Asiatic wild ass question was asked year before.
  • Great Indian mustard also we know
  • Cheetal and blue bull can not be endangered
  • Saras also won’t be endangered
  • We got lucky in this question because of options

7. Which of the following can be threats to the biodiversity of a geographical area?

  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

  • 1, 2 and 3 are obviously threats
  • Promotion of vegetarianism, seriously? Animals will not be killed for meat. But what about conversion of forests into agricultural fields?
  • Basically question from IPCC report which suggested world to shift to veg at least 2 days a week as non veg is very energy and water intensive
  • In fact beef is the most harmful to environment

7. Consider the following :

  1. Black-necked crane
  2. Cheetah
  3. Flying squirrel
  4. Snow leopard

Which of the above are naturally found in India?

(a) 1, 2 and 3 only

(b) 1, 3 and 4 only

(c) 2 and 4 only

(d) 1, 2, 3 and 4

  • Cheetah, we all know is extinct from India. So no question of it being naturally found
  • Exclude 2, reach the answer8/8

8. The acidification of oceans is increasing. Why is this phenomenon a cause of concern?

  1. The growth and survival of calcareous phytoplankton will be adversely affected.
  2. The growth and survival of coral reefs will be adversely affected.
  3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
  4. The cloud seeding and formation of clouds will be adversely affected.

Which of the statements given above is /are correct?

(a) 1, 2 and 3 only

(b) 2 only

(c) 1 and 3 only

(d) 1, 2, 3 and 4

  • Done in geography
  • How will cloud formation be affected

9. The Millennium Ecosystem Assessment describes the following major categories of ecosystem services-provisioning, supporting, regulating, preserving and cultural. Which one of the following is supporting service?

(a) Production of food and water

(b) Control of climate and disease

(c) Nutrient cycling and crop pollination

(d) Maintenance of diversity

  • 1 is not support – it’s provisioning of food and water, provisioning service
  • 2nd would be regulating services
  • 3rd also regulating

10. What would happen if phytoplankton of an ocean is completely destroyed for some reason?

  1. The ocean as a carbon sink would be adversely affected.
  2. The food chains in the ocean would be adversely affected.
  3. The density of ocean water would drastically decrease.

Select the correct answer using the codes given below :

(a) 1 and 2 only

(b) 2 only

(c) 3 only

(d) 1, 2 and 3

  • 1 is true – photosynthetic plant
  • 2 is true – any species gone – food chain adversely affected
  • 3rd – drastic decrease, exaggeration, pause and think

11. What is the role of ultraviolet (UV) radiation in the water purification systems?

  1. It inactivates /kills the harmful microorganisms in water.
  2. It removes all the undesirable odours from the water.
  3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

  • 2, all types of odour, red flag, pause and think. Wrong
  • 3rd is flocculation method of purifying water, that is what alom does

12. Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used

  1. in the production of plastic foams
  2. in the production of tubeless tyres
  3. in cleaning certain electronic components
  4. as pressurizing agents in aerosol cans

Which of the statements given above is/are correct?

(a) 1, 2 and 3 only

(b) 4 only

(c) 1, 3 and 4 only

(d) 1, 2, 3 and 4

  • It’s not used in the production of tubeless tyres
  • Guess work would lead to making all 4, risky strategy

13. Government of India encourages the cultivation of ‘sea buckthorn’. What is the importance of this plant?

  1. It helps in controlling soil erosion and in preventing desertification.
  2. It is a rich source of biodiesel.
  3. It has nutritional value and is well-adapted to live in cold areas of high altitudes.
  4. Its timber is of great commercial value.

Which of the statements given above is /are correct?

(a) 1 only

(b) 2, 3 and 4 only

(c) 1 and 3 only

(d) 1, 2, 3 and 4

It was in the news then as govt had launched a programme

By Dr V

Doctor by Training | AIIMSONIAN | Factually correct, Politically not so much | Opinionated? Yes!

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