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5 April 2025

Biodiversity MCQs | RRB JE, ALP, NTPC Environment Previous Questions


Biodiversity MCQs | RRB JE, ALP, NTPC Environment Previous Questions

 

Biodiversity mcq

Biodiversity

1. The Ramsar convention is related to the

conservation of–

(a) Grasslands (b) Wetlands

(c) Oceans (d) Forests

RRB JE CBT-II 31.08.2019 IInd Shift

Ans : (b) Ramsar Convention is a convention on

wetlands that was signed in 1971 in the Iranian city of

Ramsar. There are 49 Ramsar sites in India.

2. In which state is the Kanchenjunga Biosphere

Reserve located in the UNESCO world list?

(a) Maharashtra (b) Madhya Pradesh

(c) Assam (d) Sikkim

RRB Group-D 25-09-2018 (Shift-I)

Ans. (d) The Kanchenjunga Biosphere Reserve of

Sikkim, is one of the world's highest eco-systems

which, has been included in the list of UNESCO's

World Network of Biosphere Reserves (WNBR). This

is the 11th Biosphere Reserve of India to be included

in this list. Prior to this, biospheres like Nanda Devi,

Simlipal, Sundarban and Nilgiri have been included in

this list.

3. ________ is a bio reserve in India that is also a

UNESCO world Heritage Site.

(a) Nokrek National Park

(b) Gulf of Mannar

(c) Pachmarhi Biosphere Reserve

(d) Sundarbans

RRB NTPC 27.03.2021 (Shift-II) Stage Ist

Ans. (d) : The Sundarban, was included in the

UNESCO World Heritage Site in 1987. It is also in the

UNECO World Network of Biosphere Reserves. Out of

40 World Heritage Sites, 32 are cultural, 7 are natural

and 1 is mixedsite.

4. The most accurate description of ‘Biosphere

Reserve Area' is –

(a) Bio –gas production site

(b) Mineral deficient reserve state

(c) Study site of Sustainable development

(d) Destinations affected by Deforestation.

RRB NTPC Stage-Ist, 19.01.2017(Shift-II)

Ans. (c) ‘Biosphere Reserve Area' is the most

accurate description of Study site of Sustainable

development. The Indian government has established

18 biosphere reserves in India, which protects a large

areas of natural habitat than a typical national park or

animal sanctuary, and often include one or more

national parks or preserves, along with buffer zones

that are open to some economic uses.

5. The Sundarban Delta is formed by which of the

following rivers?

(a) Ganga and Yamuna

(b) Ganga and Brahmaputra

(c) Mahanadi and Brahmaputra

(d) Ganga and Mahanadi

RRB NTPC 03.03.2021 (Shift-II) Stage Ist

Ans. (b) : The Ganges- Brahmaputra Delta (also known

as the Brahmaputra Delta, the Sundarbans Delta or the

Bengal Delta) is a river delta in the Bengal region of the

Indian subcontinent. The name Sundarbans is thought to

be derived from Sundari (Heritiera fomes), the name of

the large mangrove trees found in abundance in this

area.

6. Which is the correct full form of IPBES from

below?

(a) Intergovernmental Science Policy Platform

on Biodiversity and Ecosystem Services

 

(b) International Programme of Biodiversity and

Ecosystem Sciences

(c) Intergovernmental Platform on Biodiversity

and Ecosystem Services

(d) International Policy of Biodiversity and

Ecosystem Services

RRB NTPC 17.01.2021 (Shift-II) Stage Ist

Ans. (a) : The Intergovernmental Science Policy

Platform on Biodiversity and Ecosystem Services

(IPBES) is an independent intergovernmental body

established by states to strengthen the science policy

interface for biodiversity and ecosystem services for the

conservation and sustainable use of biodiversity, longterm

human well being and sustainable development. It

was established in Panama City, on 21 April 2012 by 94

governments. It is not a United Nations body. However,

at the request of the IPBES Plenary and with the

authorization of the UNEP Governing Council in 2013,

The United Nations Environment Programme (UNEP)

provides secretariat services to IPBES.

7. Where the Simlipal Bio Reserve is located?

(a) Assam (b) Meghalaya

(c) Odisha (d) West Bengal

RRB NTPC Stage-Ist, 28.04.2016 (Shift-I)

Ans. (c) Similipal bio reserve is a national Park and an

Elephant reserve located in "Mayurbhanj" district of

Odisha State in India. It was declared a bioshpere

reserve by the government of India in June 1994. It has

been a part of the UNESCO World Network of

Biosphere Reserve since 2009.

8. Which bio-reserves of India are not included in

the world network biosphere-reserve?

(a) Nanda Devi (b) Sunderbans

(c) Gulf of Mannar (d) Manas

RRB NTPC 04.03.2021 (Shift-I) Stage Ist

Ans. (d) : Biosphere reserves are areas of terrestrial

and coastal or marine ecosystems or its amalgamation.

The biosphere reserve network was launched in 1971

by UNESCO, two years after the initiation of MABMan

and the Biosphere program. It promotes the

harmonious assimilation of people and nature for

sustainable development in different ways. The

Government of India established 18 biospheres in the

country (categories generally relating to IUCN

Category V Protected areas).There are total 12

biosphere reserves of India which have been

recognized internationally under Man and Biosphere

Reserve program. Recently, Panna Biosphere Reserve

was also given the International status of UNESCO

Protected Biosphere Reserve. The status was given in

the year 2020, and prior to that, the Khangchendzonga

Biosphere Reserve from India was also included in

this list in 2018. The UNESCO Protected Biosphere

Reserves list of India is given below:

YEAR NAME STATES

2000 Nilgiri Biosphere Reserve Tamil Nadu

2001 Gulf of Mannar Biosphere

Reserve

Tamil Nadu

2001 Sundarbans Biosphere

Reserve

West Bengal

2004 Nanda Devi Biosphere

Reserve

Uttarakhand

2009 Pachmarhi Biosphere

Reserve

Madhya

Pradesh

2009 Nokrek Biosphere Reserve Meghalaya

2009 Simlipal Biosphere Reserve Odisha

2012 Achanakmar-Amarkantak

Biosphere Reserve

Chhattisgarh

2013 Great Nicobar Biosphere

Reserve

Great Nicobar

2016 Agasthyamala Biosphere

Reserve

Kerala and

Tamil Nadu

2018 Khangchendzonga

Biosphere Reserve

Part of North

and West

Sikkim

districts

2020 Panna Biosphere Reserve Madhya

Pradesh

9. Which of the following is included in

UNESCO's World Network of Biosphere

Reserves (WNBR)?

(a) Kanchenjunga Biosphere Reserve

(b) Gulf of Mannar

(c) Nanda Devi

(d) Eucalyptus biosphere

RRB Group-D 24-09-2018 (Shift-I)

Ans. (*) See the explanation of the above question.

Note– This question has been rejected by the RRB.

10. Which Biosphere Reserve of India has become

the 11th such entry from India to be included in

the UNESCO's world network of Biosphere

Reserves in 2018?

(a) Cold Desert (b) Panchmarhi

(c) Nanda Devi (d) Khangchendzonga

RRB NTPC 17.01.2021 (Shift-I) Stage Ist

Ans. (d) : See the explanation of the above question.

11. In which of the following states is the

Pachmarhi Biosphere Reserve located?

(a) Punjab (b) Madhya Pradesh

(c) Uttar Pradesh (d) Kerala

RRB NTPC 17.01.2021 (Shift-II) Stage Ist

Ans. (b) : The Pachmarhi Biosphere Reserve is a nonuse

conservation area and biosphere reserve in the

Satpura Range of Madhya Pradesh state, in Central

India. The conservation area was created in 1999 by the

Indian government. UNESCO designated it as a

biosphere reserve in 2009. The Pachmarhi Biosphere

Reserve is located within an area of Hoshangabad,

Betul and Chhindwara districts of Madhya Pradesh state

in India.

Its include three wildlife conservation units-

(i) Bori Sanctuary

(ii) Pachmarhi Sanctuary

(3) Satpura National Park

 

12. ________ is NOT a notified Biosphere reserve

in India.

(a) Nallamala (b) Agasthyamala

(c) Nilgiri (d) Panchmarhi

RRB NTPC 05.02.2021 (Shift-I) Stage Ist

Ans. (a) India has a total of 18 notified biosphere

reserve. Nallamala is not a biosphere reserve.

Nallamala is a hill and an undistributed stretch of

forest in Andhra Pradesh and Telangana.

13. Which of the following countries shares some

part of the Rann of Kutch with India?

(a) Afghanistan (b) Pakistan

(c) China (d) Nepal

RRB NTPC 24.07.2021 (Shift-II) Stage Ist

Ans. (b) : The Great Rann of Kutch is a salt marsh

located in the Thar Desert in the Kutch district of Gujarat.

It is one of the largest salt deserts in the world. In India,

the northern boundary of the Rann of Kutch forms the

International border between India and Pakistan. The

Rann of Kutch lies on the border between the Indian state

of Gujarat and the Sindh province of Pakistan.

14. Which of the following statements is

INCORRECT about the Great Rann of Kutch?

(a) It is a fresh water lake

(b) It is inhabited by the Kutchi people

(c) It is a salt marsh in the Thar desert

(d) Flamingoes migrate to nest in large numbers

RRB NTPC 02.02.2021 (Shift-I) Stage Ist

Ans. (a) : A salt or saline marsh in the Thar Desert or

the Great Indian Desert is situated in the Kutch District

in the state of Gujarat is known as the Rann of Kutch.

The Great Rann of Kutch is also one of the largest salt

deserts in the world. The district of Kutch has been

inhabited by the people of Kutchi. The Rann of Kutch is

a wide expanse of desert and has saltwater resources

and it provide a suitable environment for the

flamingoes. It is significant that, Kutch Biosphere

Reserve is mainly composed of two major ecosystems

called Great Rann of Kutch and Little Rann of Kutch.

Hence, statement made in option (a) is incorrect.

15. The Ramsar Convention is for the:

(a) Conservation of soil fertility

(b) Conservation of wetlands

(c) Conservation of tropical forests

(d) Control of ozone layer depletion

RRB NTPC 15.03.2021 (Shift-I) Stage Ist

Ans. (b) : The Ramsar Convention on Wetlands is an

international treaty for “the conservation and

sustainable use of wetlands”. It is also known as the

Convention on Wetlands. It is named after the city of

Ramsar in Iran, where it was signed on 2nd of

February 1971. The 2nd of February each year is

observed as World Wetlands Day. As of January 2022,

there are 49 Ramsar Sites in India.

16. Which of the option given below is an

international treaty for conservation and

sustainable use of wetland?

(a) Bonn agreement

(b) Rotterdam conference

(c) Espo conference

(d) Ramsar conference

RRB NTPC Stage-Ist, 18.04.2016 (Shift-III)

Ans. (d) See the explanation of the above question.

17. The theme for wetland day in 2016 was –

(a) Sustainable livelihood

(b) Wetlands take care of water

(c) Wetlands for our future

(d) Wetlands and agriculture

RRB NTPC Stage-Ist, 19.04.2016 (Shift-I)

Ans. (a) Wetlands for our Future: Sustainable

Livelihoods was the theme for World Wetlands

Day in 2016. World Wetlands Day 2021. This year

theme highlights the importance of wetlands as a

source of freshwater and encourages action to restore

them and stop their loss.

18. World wetland day is celebrated on ___February

of every year.

(a) 2 (b) 3

(c) 4 (d) 5

RRB NTPC Stage-Ist, 19.04.2016 (Shift-II)

Ans. (a) World Wetlands Day is observed every year

on February 2. It is celebrated to raise global

awareness about the vital role of wetlands for people

and our planet. This day also marks the date of the

adoption of the Convention on wetlands on February

2, 1971, in the Iranian city of Ramsar on the shore of

the Caspian Sea.

19. Which of the following two regions are

biodiversity hot-spots of India?

(a) Krishna Wildlife Sanctuary and Kolleru Bird

Sanctuary

(b) Western Ghats and Eastern Himalayas

(c) Similipal National Park and Satkosia Tiger

Reserve

(d) Kaziranga National Park and Eastern Ghats

RRB NTPC 25.01.2021 (Shift-II) Stage Ist

Ans. (b) : Western Ghats and Eastern Himalayas are

two regions of biodiversity hot-spots of India. To be

classified as a Bio diversity hotspot, a region must have

lost at least 70% of its original natural vegetation,

usually due to human activity (Deforestation, Pollution,

etc.). There are 36 recognized biodiversity hot-spots in

the world.

20. Andaman teal is an example of which category

of animal species?

(a) Endemic species (b) Normal species

(c) Extinct species (d) Rare species

RRB NTPC 19.01.2021 (Shift-II) Stage Ist

Ans. (a) : Andaman teal is an example of endemic

species of the Andaman Islands and Great Coco Island.

They are found in inland pools as well as mangroves

and lagoons. The species were formerly considered as a

subspecies of the Sunda teal.

 

 

21. The Institute of Forest Biodiversity (IFB) is

situated in ------.

(a) Kerala (b) Jammu

(c) Rajasthan (d) Hyderabad

RRB NTPC 31.07.2021 (Shift-II) Stage Ist

Ans. (d) : Institute of Forest Biodiversity (IFB) is a

research institute situated in Hyderabad in the state of

Telangana, India. It was established in 1997. It works

under the Indian Council of Forestry Research and

Education (ICFRE) of the Ministry of Environment,

Forests and Climate Change, Government of India.

22. When was the United States Environmental

Protection Agency Established?

(a) March 1979 (b) January 1985

(c) December 1980 (d) December 1970

RRB NTPC 11.02.2021 (Shift-I) Stage Ist

Ans. (d) : The Environmental Protection Agency (EPA)

is an independent executive agency of the United States

federal government tasked with environmental

protection matters. President Richard Nixon proposed

the establishment of EPA on 9 July 1970. It began to

operate on 2 December 1970, after Nixon signed an

executive order.

23. Where is Dibru-Saikhowa Bio-Reserve located?

(a) Assam (b) West Bengal

(c) Nagaland (d) Sikkim

RRB NTPC 06.04.2021 (Shift-II) Stage Ist

Ans. (a) : Dibru-Saikhowa is a National Park as well

as a Biosphere Reserve situated in the south bank of

the river Brahmaputra in Assam.The forest type of

Dibru-Saikhowa comprises semi-evergreen forests,

deciduous forests, littoral and swamp forests and

patches of wet evergreen forests. It is the largest

swamp forest in north-eastern India. It is an identified

Important Bird Area (IBA), notified by the Birdlife

International. It is most famous for the rare whitewinged

wood ducks as well as feral horses. Mammals

found in the Park include Tiger, Elephant, Leopard,

Jungle Cat, Bears, Small Indian Civet, Squirrels,

Gangetic Dolphin, Hoolock Gibbon, etc.

24. The World Largest reef system the 'Great

Barrier reef' is situated in which sea?

(a) Celtic Sea (b) Beaufort Sea

(c) Caspian Sea (d) Coral Sea

RRB NTPC 30.01.2021 (Shift-I) Stage Ist

Ans. (d) : The world largest reef system the 'Great

Barrier Reef ' is situated in the Coral Sea, off the coast

of Queensland, Australia. Coral reefs are made up of

calcium carbonate released by coral living in the Ocean.

The coral sea is a marginal sea of the South Pacific

Ocean, located in northeast of the York Intercontinental

Peninsula on the northern coast of Australia.

25. Where is the world's largest coral reef found?

(a) Japan (b) Australia

(c) Chile (d) Philippines

RRB NTPC 02.02.2021 (Shift-I) Stage Ist

Ans. (b) : See the explanation of above question.

26. To whom does biodiversity refer?

(a) Recycling of solid waste

(b) Diversity of earth and life

(c) Conservation of culture and traditions

(d) Animals and studies

RRB NTPC Stage-Ist, 05.04.2016 (Shift-II)

Ans. (b) Biodiversity refers to the multiplicity to

species to animal and plants on given Ecological

system or coincidence. It is also used to describe the

variety of living species on Earth including plants,

animals, bacterias, fungi.

27. What does biodiversity refer to?

(a) To the entire species of an area.

(b) To entire ecology of an area.

(c) To the entire genes of an area.

(d) All of the above.

RRB J.E. 14.12.2014 (Sett-02, Red Paper)

Ans. (a) See the explanation of above question.

28. The following are the main features of

biological hotspots –

(a) Local flowering plants and their associate

dangers.

(b) Diversity of flora and fauna

(c) Present day extinction status of some species.

(d) Achievement of diverse gene furrow.

RRB NTPC Stage-Ist, 26.04.2016 (Shift-III)

Ans. (c) A biodiversity hotspot is a bio geographic

region that is both a significant reservoir of

biodiversity and is threatened with destruction. The

term biodiversity hotspot specifically refers to

biologically rich areas around the world that have lost

at least 70 percent of their original habitat.

29. Which of these mammalian organisms has

become extinct due to human- caused seasonal

changes?

(a) Urmus maritimus

(b) Red Panda

(c) Bramble Cay Melomys

(d) Panther Ansia

RRB NTPC Stage-Ist, 19.01.2017 (Shift-III)

Ans. (c) The Bramble Cay melomys is an extinct

member of the genus Melomys, which contains

approximately 20 species of rodents living in the wet

habitats of northern Australia (Far North Queensland),

New Guinea, Torres Strait Islands and islands of the

Indonesian archipelago.

30. Which of the following statement is incorrect?

(a) Mangroves maintain biodiversity.

(b) Mangroves provide mangoes.

(c) Mangroves prevent floods.

(d) Mangroves are being destroyed due to

urbanization.

RRB NTPC Stage-Ist, 29.03.2016 (Shift-III)

Ans. (b) Mangroves protect shorelines from damaging

storm and hurricane winds, waves, and floods.

Mangroves also help prevent erosion by stabilizing

sediments with their tangled root systems. They

maintain water quality and clarity, filtering pollutants

and trapping sediments originating from land.

Mangroves do not produce mangoes.

 

31. Which of the following is the largest area of

mangrove forest in the world?

(a) Namdapha National Park

(b) Rann of Kutch

(c) Balphakram National Park

(d) Sundarban

RRB NTPC Stage-Ist, 19.01.2017 (Shift-II)

Ans. (d) The largest area of mangroves forest in the

world is Sundarban. The Sundarbans is the worlds

longest river delta located in India and Bangladesh.

The sunderban is also an ecologically fragile and

climatically vulnerable region. The sunderban is also

known for its wide range of flora and fauna.

32. Which of the following states in India has the

maximum area under Mangrove?

(a) Gujarat (b) Andhra Pradesh

(c) Maharashtra (d) West Bengal

RRB NTPC Stage-Ist, 16.04.2016 (Shift-III)

Ans. (d) West Bengal has maximum mangrove forest

cover. According to Forest Survey of India report,

West Bengal has 42.45% of the country's mangrove

cover, while Gujarat has 23.66%. The overall

mangrove cover in the country is 4975 sq km. The

total mangrove cover in West Bengal is 2112 sq km.

Gujarat has the second largest mangrove cover in the

Country after West Bengal. Point to be noted is that,

the mangrove cover in Gujarat has increased by 37 sq

km, which is the highest expansion recorded in the

country. Gujarat has 1177 sq km mangrove cover.

33. In India, …. is generally considered as a tidal

forest –

(a) Mountain forest (b) Dry land

(c) Desert Forests (d) Lakes

RRB Group-D 28.09.2018 (Shift-II)

Ans. (d) In India Lakes are generally considered as a

tidal forest. Lakes, Flood plains, Reservoirs and

Rivers are part of the Freshwater Ecosystem. Indian

tidal or mangrove forests are mainly situated on the

Gangetic Delta and in Coastal Plain in west Bengal,

called the Sundarban. The Indian tidal or mangrove

forests are most luxuriant around the mouths of large

rivers and in sheltered bays and are found mainly in

areas, where annual rainfall is fairly high. The plants

in these forests include trees, shrubs, ferns and palms

and these plants are mainly found in the tropics and

sub-tropics on riverbanks and along coastlines.

34. The Sundarban is the largest single block of the

world’s halophytic…. forest.

(a) Wild Bushes (b) Papyrus

(c) Mangrove (d) Marsh

RRB NTPC Stage-Ist, 22.04.2016 (Shift-II)

Ans. (c) The Sundarban is the largest mangrove forest

in the world, located in the Ganges River delta in

Bangladesh and West Bengal, India. The Pichavaram

mangroves in Tamil Nadu is India's one of the largest

mangrove forests.

35. Who introduced the concept of biodiversity

hotspot?

(a) Christopher Columbus

(b) Norman Myers

(c) Christoph Schwitzer

(d) Charles Darwin

RRB JE CBT-II 28–08–2019 (evening)

Ans : (b) Norman Myers introduced the concept of

Biodiversity hotspot A biodiversity hotspot is a

biogeographic region with significant levels of

biodiversity that is threatened by human habitation.

36. International biodiversity day is celebrated on-

(a) 5 June (b) 22 may

(c) 20 may (d) 15 may

RRB J.E. 31.05.2019 (Shift-1)

Ans. (b) International biodiversity day is celebrated

every year on 22 May.



RRB JE Detailed Latest Syllabus






Environment and Ecosystem MCQs | RRB JE, ALP, NTPC Environment Previous Questions

 

Environment and Ecosystem MCQs | RRB JE, ALP, NTPC Environment Previous Questions


Environment and Ecosystem 

Environment  Ecosystem mcq



1. Which of the following statements about environmental education is false?

(a) Environmental Education will prepare the

next generation to plan appropriate strategies

for addressing developmental environmental

issues

(b) Environmental education does not advocate a

particular viewpoint or course of actions

(c) Environmental education is essential for the

younger generation only

(d) Environmental Education is evolving to be

education for sustainable and ethical

development both at a local and global level

RRB JE CBT-II 29–08–2019 (evening)

Ans. (c) Regarding Environmental education, statement

in option (c) is wrong because environmental education

is essential for the youth and adults both.

2. Which of the following conceptual spheres of

the environment is having the least storage

capacity for matter?

(a) Lithosphere (b) Hydrosphere

(c) Atmosphere (d) Biosphere

RRB-JE 30.08.2019, Ist Shift

Ans. (c) : The Biosphere, Lithosphere and Hydrosphere

contains a lot of masses as compared to the atmosphere

which contains gases and clouds. Hence Atmosphere is

having the least storage capacity for matter.

3. Which was the largest marine protected area in

the world which was formed in October 2016?

(a) Ireland (b) Italy

(c) Antarctica (d) Scotland

RRB NTPC 17.01.2017 (Shift-I) Stage Ist

Ans. (c) The world's largest marine protected area is

located in Antarctica, which was formed in October

2016. The Ross Sea in Antarctica is the world's largest

marine protected area as it is a home to huge numbers

of krill, a staple food for species including whales and

seals.

4. What is the reason for bio-Magnification?

(a) Ozone (b) Organo-Chloride

(c) Lichen (d) Protein

RRB NTPC Stage-Ist, 29.04.2016 (Shift-II)

Ans. (b) Bio magnification stands for Biological

Magnification, which means the increase of contaminated substances or toxic chemicals that take

place in the food chains. These substances often arise from intoxicated or contaminated environments. The contaminants include heavy metals namely mercury

 

arsenic, pesticides such as DDT, and polychlorinated

biphenyls (PCBs) compounds which are then taken up

by organisms because of the food they consume or

the intoxication of their environment. The main reason

is Organo- chloride which is found in DDT Pesticide.

5. To determine the health of aquatic organisms,

which of the following declaration is

calculated?

(a) Dissolved oxygen

(b) Dissolved fluorine

(c) Dissolved methane

(d) Dissolved calcium

RRB NTPC Stage-Ist, 27.04.20167 (Shift-I)

Ans. (a) Water temperature affects dissolved-oxygen

concentrations in a river or water body. Dissolved

oxygen in surface water is used by all forms of aquatic

life; therefore, this constituent typically is measured to

assess the health of lakes and streams.

6. Who has coined the term 'ecology'?

(a) Charles Darwin (b) Eugenius Warming

(c) Eugene Odum (d) Ernst Haeckel

RRB NTPC 01.02.2021 (Shift-II) Stage Ist

Ans. (d) : The term Ecology was first used by Ernst

Haeckel in 1866 in his book 'General morphology and

their organisms'. He applied the term ecology to the

'relation of the animal both to its organic as well as its

inorganic environment.

7. The ten percent law of energy transfer was

given by:

(a) Charles Darwin

(b) Thomas Morgan

(c) Watson and Crick

(d) Raymond Lindeman

RRB NTPC 11.03.2021 (Shift-I) Stage Ist

Ans. (d) : The ten percent law of energy transfer in a

food chain was given by Raymond Lindeman.

The ten percent law of energy transfer states that when

the energy is transferred from one trophic level to

another. Only ten percent of energy transfers to the next

trophic level and the ten percent of that energy level

passes to the next level and as a result there is a

considerable decrease in the amount of energy till it

reaches the top most trophic level.

Consider an example of simplest food chain:

Grass Deer Lion

8. From a structural point of view, all ecosystems

consist of abiotic and biotic factors. Which of

the following is abiotic factor of an ecosystem?

(a) Atmospheric humidity

(b) Temperature

(c) Carbon dioxide

(d) Green plants

RRB NTPC 15.02.2021 (Shift-II) Stage Ist

 

Ans. (d) : Biotic and abiotic factors together make up

ecosystems. Biotic factors are living things within an

ecosystem; such as plants, animals, and bacteria, while

abiotic are non-living components; such as water, soil

atmosphere and temperature. The way these

components interact is critical in an ecosystem.

9. Name the type of nutrition in which the

organism takes in nutrients in solution form

from dead and decaying matters.

(a) Heterotrophic nutrition

(b) Autotrophic nutrition

(c) Insectivorous nutrition

(d) Saprophytic nutrition

RRB NTPC 01.04.2021 (Shift-I) Stage Ist

Ans. (d) : In Saprophytic nutrition the living

organisms live and feed on dead and decaying

organisms called Saprophytes. They break down the

complex organic matter into simpler substances that

are taken up by the plants for various metabolic

activities. Thus, Saprophytes play a significant role in

the ecosystem. Fungi and a few bacteria are

saprophytes. The Saprophytes secrete digestive juices

and breakdown the organic matter around them.

Following are a few examples of saprophytes:Mucor,

Yeast, Penicillium etc.

10. Which of the following is in the third trophic

level of the food chain?

(a) Producers

(b) Top consumers

(c) Secondary consumers

(d) Primary consumers

RRB NTPC 07.01.2021 (Shift-I) Stage Ist

Ans. (c) : Food chain is defined as the phenomenon of

transfer of energy through series of organism by

successive trophic levels.

In food chain there are four chains of trophic levels. It

includes producers, herbivores (primary consumers),

carnivores (secondary consumers), predators (tertiary

consumers).

11. Green plants and certain bacteria manufacture

their own food. Which one of the following

nutrition process do they adopt?

(a) Parasitic Nutrition

(b) Autotrophic Nutrition

(c) Saprotrophic Nutrition

(d) Holozoic Nutrition

RRB NTPC 18.01.2021 (Shift-I) Stage Ist

Ans. (b) : Autotrophic Nutrition is a process in which

certain organisms prepare their own food. In this

process, organisms manufacture their food in presence

of sunlight with the help of inorganic elements such as

carbon dioxide and water.

12. Which of these is not the biotic factor of the

ecosystem?

(a) Consumer (b) Producer

(c) Decomposer (d) Climate

RRB SSE, (21.12.2014,Set-09, Yellow Paper)

Ans. (d) Among the given options, climate is not a

biotic factor of the ecosystem. An ecosystem contains-

Biotic Factor-

(a) ProducersManufacture their own food. Under it

all green trees and plant comes.

(b) ConsumersThey depend on the producer for

food. They are placed in the following category-

(i) Primary ConsumersReceive their food directly

from the producer. They are vegetarians e.g.

Cow, Goats etc.

(ii) Secondary ConsumersReceive their food from

primary consumers e.g. Cat eats rat.

(iii) Tertiary consumersThey get their food from

secondary consumers e.g. Human

(c) DecomposersThey get their food from dead

body of producer and consumers e.g. Fungi.

Abiotic factors–

(a) Air (b) Water (c) Soil

(d) Mineral (e) Temperature

13. Which of these are nature cleaners?

(a) Producers (b) Consumers

(c) Decomposers (d) Carnivorous

RRB SSE (21.12.2014, Set-07, Yellow Paper)

Ans. (c) A food chain is a series of plants/animals

which are interrelated in the form of organism being

eaten as food by the other. It consists of producers,

consumers and decomposers. Plants are producers.

The herbivores are primary consumers and carnivores

are secondary consumers. Decomposers are those

which decompose the waste organic matter and

release energy back in to the environment. Hence,

they are also called as nature's cleaner. They are

present in the apex of the eco-pyramid.

14. Which of the following are not omnivorous?

(a) Rat (b) Ant

(c) Bear (d) Snake

RRB NTPC Stage-Ist, 17.01.2017 (Shift-II)

Ans. (d) An omnivorous is an animal that has the

ability to eat and survive on both plants and animals.

Obtaining energy and nutrients from plants and

animals, omnivores digest carbohydrates, protein, fat,

and fiber, and metabolize the nutrients and energy of

the sources absorbed. For e.g. bears, mice, ant etc. A

snake is not an omnivorous animal. It is a carnivorous

animal. A carnivore, meaning "meat eater", is an

organism that derives its energy and nutrient

requirements from a diet consisting mainly or

exclusively of animal tissue, whether through

predation or scavenging for e.g. Lion, tigers etc.

 

15. Which of the following is the second trophic

level of the food chain?

(a) Grass (b) Rat

(c) Snake (d) Eagle

RRB NTPC Stage-Ist, 26.04.2016 (Shift-II)

Ans. (b) The second trophic level has primary

consumers called heterotrophs. These organisms have

to consume producers to incorporate their energy into

their own biomass. They cannot make their own food

from light or chemicals. The third trophic level has

secondary consumers, which are heterotrophs that eat

other consumers e.g., rat, buffalo etc.

16. Which of the following is the suitable food

chain?

(a) Producer, Herbivorous, Carnivorous

(b) Producer, Carnivorous, Herbivorous

(c) Herbivorous, Carnivorous, Producer

(d) Herbivorous, Producer, Carnivorous

RRB SSE (Set-07, 21.12.2014, Yellow Paper)

Ans. (a) Suitable food chain is Producer, Herbivorous,

Carnivorous. Producers are those who make their own

food like- trees, plants etc. The primary consumers

(Herbivorous) are those who depend on producers

such as cow, buffalo, etc. Secondary consumers

(Carnivorous) depend upon primary consumers.

Carnivorous depend on another animals.

17. Who are the primary consumers?

(a) Scavenger (b) Saprophytes

(c) Carnivorous (d) Herbivorous

RRB J.E. (14.12.2014, Yellow Paper)

Ans. (d) Primary consumer - the consumers who

receive the food directly from the producer is called

Herbivorous e.g., cow, goat etc. Primary consumers

make up the second trophic level.

18. Dr. Dhrubajyoti Ghosh is related to which of

the following field?

(a) Astronomy (b) Bengali literature

(c) Ecology (d) Politics

RRB NTPC Stage-Ist, 19.01.2017 (Shift-III)

Ans. (c) Dr. Dhrubajyoti Ghosh was related to the

field of ecology. Dr Dhrubajyoti Ghosh was a UN

Global 500 Laureate, Special Advisor on Agricultural

Ecosystems, part of the Commission on Ecosystem

Management, and Regional Chair for South Asia of

the IUCN. He is well known for devoting his life for

the survival of the East Kolkata Wetlands.

19. Which of the following populations has the

most population in a food chain?

(a) Secondary consumer

(b) Primary consumer

(c) Decomposer

(d) Producer

RRB NTPC Stage-Ist, 19.01.2017 (Shift-III)

Ans. (d) Producer has the most population in a food

chain, because without producers consumer

populations would go down. So this proves that we

have more producers in an ecosystem than consumers.

20. What is the difference between the primary

consumer and secondary consumer in the food

chain?

(a) Primary consumers eat plants, and other

consumers. Secondary consumers eat plants

and decomposed substances.

(b) Primary consumers eat only plants, secondary

consumers eat primary consumers.

(c) Primary consumers eat plants and

decomposed substances. Secondary

consumers eat plants and other consumers.

(d) Primary consumers eat other consumers.

Secondary consumers eat only plants.

RRB NTPC Stage-Ist, 17.01.2017 (Shift-I)

Ans. (b) Primary consumers are animals that eat

primary producers; they are also called herbivores

(plant-eaters). Secondary consumers eat primary

consumers. They are carnivores (meat-eaters) and

omnivores (animals that eat both animals and plants).

(i) Primary Consumers- Receive their food directly

from the producer. They are herbivorous E.g.

Cow, goats etc.

(ii) Secondary Consumers- Receive their food from

primary consumers. E.g. Cat eats rat.

21. What is the meaning of Ecotone?

(a) Ecotone is where two biomass meet.

(b) It is a region of low survival species.

(c) Area with limited fauna and flora.

(d) Area of high biomass production.

RRB NTPC Stage-Ist, 11.04.2016 (Shift-I)

Ans. (a) An Ecotone is a transition area between two

biological communities. It is where two communities

meet and integrate. It may be narrow or wide, and it

may be local (the zone between a field and forest) or

regional (the transition between forest and grassland

ecosystems).

22. Who defined the concept of ecosystem?

(a) Arthur Tansely (b) Evelyn Hutchison

(c) Raymond Lidman (d) Charles Elton

RRB NTPC Stage-Ist, 28.03.2016 (Shift-III)

Ans. (a) The term ecosystem was first used in 1935 in

a publication by British ecologist Arthur Tansley.

Tansley devised the concept to draw attention to the

importance of transfers of materials between

organisms and their environment.

23. Aquarium is a pot in which live fish and

aquatic plants are kept. Which of the following

is correct about Aquarium?

(a) It is a man made ecosystem.

(b) It is a natural ecosystem.

(c) It is not an ecosystem.

(d) It can be called only a species.

RRB NTPC Stage-Ist, 22.04.2016 (Shift-II)

Ans. (a) Aquarium is a man made ecosystem.

An aquarium (plural aquariums or aquaria) is a place

where fish and other animals that live in water are

kept by humans. There are two type of ecosystem

such as Natural Ecosystem and Artificial or Manmade

Ecosystem. The artificial ecosystems do not

possess a self-regulation mechanism and rely on the

human efforts to sustain themselves.

 

24. Species of animal are becoming endangered

mostly due to….....?

(a) Habitat destruction (b) Acid rain

(c) Excessive hunting (d) Water scarcity

RRB NTPC Stage-Ist, 02.04.2016 (Shift-I)

Ans. (a) Habitat destruction is currently ranked as the

primary cause of species extinction worldwide. The

destructive environmental changes include more

indirect factors like geological processes, and climate

change, introduction of invasive species, ecosystem

nutrient depletion, water and noise pollution and

others.

25. What is the scientific analysis and study of

interactions between organisms and the

environment?

(a) Ecology (b) Microbiology

(c) Entomology (d) Ornithology

RRB NTPC Stage-Ist, 02.04.2016 (Shift-I)

Ans. (a) Ecology is the scientific analysis and study of

interactions between organisms and the environment.

An ecosystem is a community of living organisms in

conjunction with the nonliving components of their

environment, interacting as a system. These biotic and

abiotic components are linked together through

nutrient cycles and energy flows.

26. Various parts of plants Vegetation and organic

waste are called -

(a) Fossil fuels (b) Nuclear power

(c) Biomass (d) Solar energy

RRB Group-D 15.11.2018 (Shift-II)

Ans. (c) Biomass refers to the organic material that is

used for production of energy. This energy production

process is referred to as Bio energy. Biomass is primarily

found in the form of living or recently living plants and

biological wastes from industrial and home use.

27. Flora and Fauna are mentioned in –

(a) Birds and Animals

(b) Mountains and Rivers

(c) Plants and Animals

(d) Humans and Animals

RRB NTPC Stage-Ist, 17.01.2017 (Shift-II)

Ans. (c) The mention of flora and fauna is related to

plants and animals. This ecosystem also includes

biotic and abiotic factors such as all animal, plants and

microorganisms, soil, water, source climate etc. All

biotic and abiotic factors in a specific area reflect a

good relationship between plants and animals.


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