Civil Service Preliminary Paper-1 Previous Year Questions on Ecology, Biodiversity Conservation & Environmental Issues - 2013

1) Consider the following pairs:
  1. Nokrek Bio-sphere Reserve : Garo Hills
  2. Logtak (Loktak) Lake : Barail Range
  3. Namdapha National Park : Dafla Hills
Which of the above pairs is/are correctly matched?
  1. 1 only
  2. 2 and 3 only
  3. 1, 2 and 3
  4. None


2) Consider the following pairs about parks and rivers passing through them:
  1. Corbett National Park: Ganga
  2. Kaziranga National Park: Manas
  3. Silent Valley National Park: Kaveri
Which of the above pairs is/are correctly matched?
  1. 1 and 2
  2. 3 only
  3. 1 and 3
  4. None


3) In which of the following States is lion-tailed macaque found in its natural habitat?
  1. Tamil Nadu
  2. Kerala
  3. Karnataka
  4. Andhra Pradesh
Select the correct answer using the codes given below.
  1. 1, 2 and 3 only
  2. 2 only
  3. 1, 3 and 4 only
  4. 1, 2, 3 and 4


4) In the grasslands, trees do not replace the grasses as a part of an ecological succession because of
  1. insects and fungi
  2. limited sunlight and paucity of nutrients
  3. water limits and fire
  4. None of the above



5) Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
  1. Oceans, lakes, grasslands, mangroves
  2. Mangroves, oceans, grasslands, lakes
  3. Mangroves, grasslands, lakes, oceans
  4. Oceans, mangroves, lakes, grasslands
 

6) Due to improper / indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste?
  1. Beryllium
  2. Cadmium
  3. Chromium
  4. Heptachlor
  5. Mercury
  6. Lead
  7. Plutonium
Select the correct answer using the codes given below.
  1. 1, 3, 4, 6 and 7 only
  2. 1, 2, 3, 5 and 6 only
  3. 2, 4, 5 and 7 only
  4. 1, 2, 3, 4, 5, 6 and 7

  

7) Which of the following can be found as pollutants in the drinking water in some parts of India?
  1. Arsenic
  2. Sorbitol
  3. Fluoride
  4. Formaldehyde
  5. Uranium
Select the correct answer using the codes given below.
  1. 1 and 3 only
  2. 2, 4 and 5 only
  3. 1, 3 and 5 only
  4. 1, 2, 3, 4 and 5


8) Which one among the following industries is the maximum consumer of water in India?
  1. Engineering
  2. Paper and pulp
  3. Textiles
  4. Thermal power
  

9) Acid rain is caused by the pollution of environment by
  1. carbon dioxide and nitrogen
  2. carbon monoxide and carbon dioxide
  3. ozone and carbon dioxide
  4. nitrous oxide and sulphur dioxide
  

10) Photochemical smog is a resultant of the reaction among
  1. NO2, 03 and peroxyacetyl nitrate in the presence of sunlight
  2. CO, 02 and peroxyacetyl nitrate in the presence of sunlight
  3. CO, CO2 and N02 at low temperature
  4. High concentration of N02, O3 and CO in the evening
  

11) With reference to food chains in ecosystems, consider the following statements:
  1. A food chain illustrates the order in which a chain of organisms feed upon each other.
  2. Food chains are found within the populations of a species.
  3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is / are correct?
  1. 1 only
  2. 1 and 2 only
  3. 1, 2 and 3
  4. None
  

12) Which one of the following terms describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?
  1. Ecotone
  2. Ecological niche
  3. Habitat
  4. Home range
  

13) With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms?
  1. Virus
  2. Fungi
  3. Bacteria
Select the correct answer using the codes given below.
  1. 1 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3      


14) Consider the following fauna of India:
  1. Gharial
  2. Leatherback turtle
  3. Swamp deer
Which of the above is/are endangered?
  1. 1 and 2 only
  2. 3 only
  3. 1, 2 and 3
  4. None 


15) Consider the following
  1. Star tortoise
  2. Monitor lizard
  3. Pygmy hog
  4. Spider monkey
Which of the above found in India?
  1. 1, 2 and 3 only
  2. 2 and 3 only
  3. 1 and 4 only
  4. 1, 2, 3 and 4


16) Consider the following organisms
  1. Agaricus
  2. Nostoc
  3. Spirogyra
Which of the above is / are used as biofertilizer / biofertilizers
  1. 1 and 2
  2. 2 only
  3. 2 and 3
  4. 3 only


17) Which of the following adds / add nitrogen to the soil?
  1. Excretion of urea by animals
  2. Burning of coal by man
  3. Death of vegetation
Select the correct answer using the codes given below.
  1. 1 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3
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