BEVAE 181 Answer Key 2022 December

IGNOU BEVAE 181 Answer Key 2022 December, Bevae 181 Answer Key, Important Questions for Bevae 181 June 2023

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Q.1. Who developed the concept of determinism?

1. Friedrich Ratzel ✅
2. Ellsworth Huntington
3. Charles Darwin
4. Alexander von Humboldt

Ans. (1) Friedrich Ratzel

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Q.2. Which of the following is not one of the seventeen Sustainable Development Goals?

1. Climate Action ✅
2. Quality Education
3. Gender Equity
4. Reducing Inequality

Ans. (1) Climate Action

Q.3. Which one of the following is a human modified environment?

1. Artificial lake
2. Sanctuaries ✅
3. Crop fields
4. Dams

Ans. (2) Sanctuaries

Q.4. Which one of the following refers to a position in the food chain?

1. Community level
2. Population level
3. Trophic level ✅
4. Biotic community

Ans. (3) Trophic level

Q.5. In the biosphere water component is known as:

1. Ecosphere
2. Atmosphere
3. Lithosphere
4. Hydrosphere ✅

Ans. (4) Hydrosphere

Q.6. Sulphur cycle is an example of:

1. gaseous cycle
2. sedimentary cycle ✅
3. both gaseous and sedimentary
4. None of the above

Ans. (2) sedimentary cycle

Q.7. Secondary consumers are:

1. plants
2. herbivores
3. carnivores ✅
4. both herbivores and carinvores

Ans. (3) carnivores

Q.8. In coniferous forest the soil is:

1. acidic and mineral deficient ✅
2. very rich in mineral nutrients
3. basic and mineral deficient
4. moderately basic and rich in mineral nutrients

Ans. (1) acidic and mineral deficient

Q.9. Chameleons, agamids and geckos are found in:

1. temperate rainforest
2. tropical seasonal forest
3. sub-tropical rainforest
4. tropical rainforest ✅

Ans. (4) tropical rainforest

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Q.10. Which one of the following species excretes very concentrated urine and does not use water for temperature regulation and can live in the desert without drinking water?

1. Camel
2. Nocturnal rodent ✅
3. Ostrich
4. Rat-tailed bat

Ans. (2) Nocturnal rodent

Q.11. Unattached aquatic organism which lives at the air-water interface is known as:

1. Periphyton
2. Plankton
3. Neuston ✅
4. Nekton

Ans. (3) Neuston

Q.12. What is the percentage of fresh water where global distribution of water resources is considered ?

1. Less than 3% ✅
2. Less than 4%
3. Less than 5%
4. Less than 6%

Ans. (1) Less than 3%

Q.13. Which one of the following is a non-renewable resource?

1. Wildlife
2. Water
3. Mineral deposits ✅
4. Forest

Ans. (3) Mineral deposits

Q.14. The average salinity of sea water is:

1. 3%
2. 3-5% ✅
3. 4-5%
4. 5%

Ans. (2) 3-5%

Q.15. Which of the following is not achieved by addition of manure?

1. A more stable aggregate structure
2. Improved cohesiveness of soil
3. Increase in water retentive capacity
4. Decrease in soil salinity ✅

Ans. (4) Decrease in soil salinity

Q.16. Which one of the following is not a part of supporting ecological systems and processes function of forest?

1. Checks the soil erosion
2. Improves the air quality
3. Reduces the intensity of cyclones
4. Acts as a carbon sink

Ans. (4) Acts as a carbon sink

Q.17. Which one of the following is a consequence of deforestation?

1. Increase in soil erosion due to reduction in vegetation ✅
2. Increase in the oxygen liberated by plants
3. Decrease in carbon dioxide level.
4. Increase in availability of forest product

Ans. (1) Increase in soil erosion due to reduction in vegetation

Q.18. Which one of the following is not a Non-Timber Forest Product (NTFP)?

1. Medicinal herbs
2. Edible leaves and flowers
3. Firewood ✅
4. Edible fruits

Ans. (3) Firewood

Q.19. Which one of the following statements about the biodiversity in India is correct ?

1. The desert areas of Gujarat and Rajasthan have a very high level of desert animal species as well as numerous rare species.
2. Large scale planting of Bt cotton has no adverse effect on biodiversity
3. Western Ghats have a very high degree of species richness and endemism. ✅
4. Conversion of biodiversity is just a fad push.

Ans. (3) Western Ghats have a very high degree of species richness and endemism.

Q.20. An ecosystem with higher diversity will be:

1. more complex, stable and resistant
2. more fragile and sensitive ✅
3. more and less stable
4. less productive

Ans. (2) more fragile and sensitive

Q.21. Which of the following animals are exclusively found in Brahmaputra Valley ?

1. Chinkara
2. Rhinoceros ✅
3. Lion-tailed Macaque
4. Houbara Bustard

Ans. (2) Rhinoceros

BEVAE 181 answer key 2022 December

Q.22. Which of the following is not a biodiversity hotspot ?

1. The Western Ghats
2. The Himalayas
3. The Nicobar Group of Islands
4. Vindhyas and Satpura region of Madhya Pradesh ✅

Ans. (4) Vindhyas and Satpura region of Madhya Pradesh

Q.23. What percentage of energy needs of India are met by the natural gas?

1. About 7% ✅
2. About 8%
3. About 6%
4. About 5%

Ans. (1) About 7%

Q.24. Sludge gas largely consists of:

1. carbon dioxide
2. sulphur dioxide
3. methane ✅
4. hydrogen sulphide

Ans. (3) methane

Q.25. Which one of the following is not a non-conventional source of energy ?

1. Fossil fuel ✅
2. Solar energy
3. Biomass energy
4. Wind energy

Ans. (1) Fossil fuel

Q.26. Which of the following is not an adverse effect of the construction of major dams in India ?

1. Submergence of forests and agricultural fields
2. Destruction of wildlife habitats
3. Displacement of people
4. Increase in the groundwater level of the surrounding region ✅

Ans. (4) Increase in the groundwater level of the surrounding region

Q.27. Fostering is a useful technique for conservation which has been found successful in:

1. Whooping crane ✅
2. Black-footed ferret
3. Angus cow
4. Seed plants

Ans. (1) Whooping crane

Q.28. Mangroves in the coastal areas work against erosion by acting as:

1. methane filters
2. regulation of water regime
3. natural bulwark ✅
4. natural recharging aquifers

Ans. (3) natural bulwark

Q.29. Which of the following is not an invasive species in India?

1. Water hyacinth
2. Congress grass
3. Prosopis juliflora
4. Neem tree ✅

Ans. (4) Neem tree

Q.30. Buffer zone plays a significant role in the preserved areas. Which one of the following is not an important function of the buffer zone?

1. It provides jobs and income without any ill-effect on species,
2. It provides transition into the unmodified natural habitat in the core.
3. It permits for moderate recreational forestry.
4. Hunting is permitted in this zone. ✅

Ans. (4) Hunting is permitted in this zone.

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Q.31. The size of Respirable Suspended Particulate Matter (RSPM) is:

1. 1-10 mm ✅
2. 10-20 mm
3. 1-20 μm
4. 10-20 μm

Ans. (1) 1-10 mm

Q.32. ____ is the phenomenon of increase in the concentration of pollutants from one link in a food chain to another.

1. Biological concentration
2. Biomagnification ✅
3. Bioconcentration
4. Biodegradation

Ans. (2) Biomagnification

BEVAE 181 answer key 2022 December

Q.33. Which one the following is a primary pollutant ?

1. Peroxy Acetyl Nitrate (PAN)
2. Nitric acid
3. Carbon dioxide ✅
4. Sulphuric acid

Ans. (3) Carbon dioxide

Q.34. High level of BOD indicates:

1. decreasing levels of organic waste in water
2. decreasing levels of sewage in water.
3. increasing levels of dissolved oxygen in water
4. decreasing levels of dissolved oxygen in water ✅

Ans. (4). decreasing levels of dissolved oxygen in water

Q.35. Underground disposal is preferred for the disposal of:

1. domestic wastes
2. radioactive nuclear wastes ✅
3. plastic wastes
4. building debris

Ans. (2) radioactive nuclear wastes

Q.36. Read the below given statements about the single-use plastics and choose the correct options.

• (i) They clog drains.
• (ii) They harm animals.
• (iii) They cause floods in cities.
• (iv) They can degrade easily

1. (i) and (ii) are correct
2. (i), (ii) and (iv) are correct
3. (i), (ii) and (iii) are correct
   ✅
4. All options are correct

Ans. (3). (i), (ii) and (iii) are correct

Q.37. Eutrophication in water bodies is caused by:

1. phosphates and nitrates ✅
2. sulphates and nitrates
3. carbonates and nitrates
4. phosphates and oxalates

Ans. (1) phosphates and nitrates

Q.38. Which of the following is not true for Chlorofluorocarbons (CFCs)?

1. They are responsible for ozone depletion.
2. They are used in paints and deodorants.
3. They are stable and remain in lower regions of atmosphere for many years.
4. They are unaffected by UV radiation in upper atmosphere. ✅

Ans. (4) They are unaffected by UV radiation in upper atmosphere.

BEVAE 181 answer key 2022 December

Q.39. Which one of the following is used to measure the concentration of ozone?

1. Parts per kilometer
2. Nanometer
3. Dobson ✅
4. Radium

Ans. (3) Dobson

Q.40. What is the approximate percentage of solar radiation which is absorbed by the atmospheric gases?

1. 10%
2. 20% ✅
3. 30%
4. 40%

Ans. (2) 20%

BEVAE 181 Answer Key 2022 December Ques 41-50

Q.41. The provision for environmental protection in our Constitution was made in the year:

1. 1976 ✅
2. 1974
3. 1980
4. 1962

Ans. (1) 1976

Q.42. When was the Wildlife Protection Act enacted ?

1. 1971
2. 1978
3. 1975
4. 1972 ✅

Ans. (4) 1972

Q.43. Which one of the following is not one of seventeen categories of polluting industries identified by the Central Pollution Control Board?

1. Pulp and paper
2. Oil refineries.
3. Food processing ✅
4. Tanneries

Ans. (3) Food processing

Q.44. Projected world population by 2100 would be:

1. 11.2 billion ✅
2. 10.2 billion
3. 12-2 billion
4. 13.2 billion

Ans. (1) 11.2 billion

Q.45. Match the following:

1. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
2. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
   ✅
3. (a)-(iii), (b)-(iv), (c) (ii), (d)-(i)
4. (a)-(iv), (b)-(ii), (c)-(ii), (d)-(i)

BEVAE 181 answer key 2022 December

Q.46. Which one of the following areas in Indian does not fall under seismic zone ?

1. Kachchh region of Gujarat
2. Chamoli and Pithoragarh in Uttarakhand
3. Assam
4. Bundelkhand region of Uttar Pradesh and Madhya Pradesh ✅

Ans. (4) Bundelkhand region of Uttar Pradesh and Madhya Pradesh

Q.47. Chandi Prasad Bhatt was associated with:

1. Silent Valley Movement
2. Green Revolution
3. Chipko Movement. ✅
4. Appiko Movement

Ans. (3) Chipko Movement.

Q.48. The teaching that all living organisms have values and rights regardless of whether they are useful or not refers to:

1. Biocentrism ✅
2. Stewardship
3. Anthropocentrism
4. The Western viewpoint

Ans. (1) Biocentrism

Q.49. Using English only material for communication to non-English speaking communities is an example of

1. social inequity
2. geographical inequity.
3. procedural inequity ✅http://www.ignou.ac.in/
4. economic inequity

Ans. (3) procedural inequity

Q.50. Which one of the following is not an ENVIS Centre ?

1. National Institute of Occupational Health (NIOH), Ahmedabad
2. Central Pollution Control Board, New Delhi
3. Tata Institute of Fundamental Research (TIFR), Mumbai
4. Madras Institute of Development Studies (MIDS), Chennai

Ans. Both 3 and 4 are correct answers because if you’ll have a look in the list mentioned in book you’ll not find both these centres.

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Ignou BEVAE 181 answer key 2022 December, BEVAE 181 answer key 2022 December

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