Environment & Ecology - 2021 PYQ

Question 28 of 19

Consider the following kinds of organisms:

1. Copepods
2. Cyanobacteria
3. Diatoms
4. Foraminifera

Which of the above are primary producers in the food chains of oceans?

A 1 and 2 B 2 and 3 C 3 and 4 D 1 and 4

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Question 29 of 19

Why is there a concern about copper smelting plants?

1. They may release lethal quantities of carbon monoxide into environment.
2. The copper slag can cause the leaching of some heavy metals into environment.
3. They may release sulphur dioxide as a pollutant.

Select the correct answer using the codes given below.

A 1 and 2 Only B 2 and 3 Only C 1 and 3 Only D 1, 2 and 3

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Question 30 of 19

Which of the following have species that can establish symbiotic relationship with other organisms?

1. Cnidarians
2. Fungi
3. Protozoa

Select the correct answer using the codes given below.

A 1 and 2 Only B 2 and 3 Only C 1 and 3 Only D 1, 2 and 3

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Question 31 of 19

‘R2 Code of Practices constitutes a tool available for promoting the adoption of

A environmentally responsible practices in electronics recycling industry. B ecological management of ‘wetlands of International Importance’ under the Ramsar Convention. C sustainable practices in the cultivation of agricultural crops in degraded lands. D ‘Environmental Impact Assessment’ in the exploitation of natural resources

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Question 32 of 19

Among the following, which one is the least water-efficient crop?

A Sugarcane B Sunflower C Pearl Millet D Red gram

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Question 33 of 19

Triclosan considered harmful when exposed to high levels for a long time, is most likely present in which of the following?

A Food preservatives B Fruit-ripening substances C Reused plastic containers D Toiletries

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Question 34 of 19

Bisphenol A (BPA) , a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?

A Low density polyethylene B Polycarbonate C Polyethylene terephthalate D Polyvinyl chloride

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Question 35 of 19

Consider the following animals:

1. Hedgehog
2. Marmot
3. Pangolin

To reduce the chance of being captured by predators, which of the above organisms rolls up/roll up and protects/ protect its/their vulnerable parts?

A 1 and 2 B 2 only C 3 only D 1 and 3

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Question 36 of 19

Which of the following are detritivores?

1. Earthworms
2. Jellyfish
3. Millipedes
4. Seahorses
5. Woodlice

Select the correct answer using the code given below.

A 1, 2 and 4 Only B 2, 3, 4 and 5 Only C 1, 3 and 5 Only D 1, 2, 3, 4 and 5

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Question 37 of 19

In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?

A Carbon cycle B Nitrogen cycle C Phosphorus Cycle D Sulphur Cycle

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Question 38 of 19

With reference to the ‘New York Declaration on Forests’. Which of the following statements are correct?

1. It was first endorsed at the United Nations Climate Summit in 2014.
2. It endorses a global timeline to end the loss of forests.
3. It is a legally binding international declaration.
4. It is endorsed by governments, big companies and indigenous communities.
5. India was one of the signatories at its inception.

Select the Correct answer using the code given below.

A 1, 2, and 4 B 1, 3, and 5 C 3 and 4 D 2 and 5

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Question 39 of 19

Which one of the following is a filter feeder?

A Catfish B Octopus C Oyster D Pelican

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Question 40 of 19

The ‘Common Carbon Metric’, supported by UNEP, has been developed for

A assessing the carbon footprint of building operations around the world. B enabling commercial farming entities around the world to enter carbon emission trading. C enabling governments to assess the overall carbon footprint caused by their countries. D assessing the overall carbon footprint caused by the use of fossil fuels by the world in a unit time.

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Question 41 of 19

How is permaculture farming different from conventional chemical farming?
1. Permaculture Farming discourages monocultural practices but in conventional chemical farming, monoculture practices are pre-dominant.
2. Conventional chemical farming can cause increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming.
3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions.
4. Practice of mulching is very important in permaculture farming but not necessarily so in conventional chemical farming.

Select the correct answer using the codes given below.

A 1 and 3 B 1, 2 and 4 C 4 Only D 2 and 3

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Question 42 of 19

In the context of India’s preparation for Climate-smart Agriculture, consider the following statements:
1. The ‘Climate-Smart Village’ approach in India is a part of a project led by the Climate Change, Agriculture and Food Security (CCAFS), an international research programme.
2. The project of CCAFS is carried out under Consultative Group on International Agricultural Research (CGIAR) headquartered in France.
3. The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) in India is one of the CGIAR’s research centres.

Which of the statements given above are correct?

A 1 and 2 Only B 2 and 3 Only C 1 and 3 Only D 1, 2 and 3

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Question 43 of 19

Consider the following statements:

**Statement 1:** The United Nations Capital Development Fund (UNCDF) and the Arbor Day Foundation have recently recognized Hyderabad as 2020 Tree City of the World.
**Statement 2:** Hyderabad was selected for the recognition for a year following its commitment to grow and maintain the urban forests.

Which one of the following is correct in respect of the above statements?

A Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1. B Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1. C Statement 1 is correct but Statement 2 is not correct. D Statement 1 is not correct but Statement 2 is correct

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Question 44 of 19

Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following?

1. Brakes of motor vehicles
2. Engines of motor vehicles
3. Microwave stoves within homes
4. Power plants
5. Telephone lines

Select the correct answer using the code given below

A 1, 2, 3 and 5 Only B 1, 2 and 4 Only C 3, 4 and 5 Only D 1, 2, 3, 4 and 5

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Question 45 of 19

What is blue carbon?

A Carbon captured by oceans and coastal ecosystems. B Carbon sequestered in forest biomass and agricultural soils. C Carbon contained in petroleum and natural gas. D Carbon present in atmosphere

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Question 46 of 19

With reference to furnace oil, consider the following statements:

1. It is a product of oil refineries.
2. Some industries use it to generate power.
3. Its use causes sulphur emissions into Environment.

Which of the statements given above are correct?

A 1 and 2 Only B 2 and 3 Only C 1 and 3 Only D 1, 2 and 3

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