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UPSC > Biodiversity

Explore popular questions from Biodiversity for UPSC. This collection covers Biodiversity previous year UPSC questions hand picked by experienced teachers.

Q 1.

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A keystone species

has a disproportionately large impact on an ecosystem.

B

typically reduces overall diversity of an ecosystem.

C

is typically an herbivore.

D

is an example of amensalism.

Q 2.

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Extinction of a weaker species by an aggressive alien species is the results of

Endemism of weaker species

B

Habitat loss

C

The Domino Effect

D

All of the above.

Q 3.

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In the Lower Himalayan Mountains, several species of salamander, an amphibian, live in or near a stream. The largest species lives in the stream and along its edges, a smaller species lives on land w ithin a meter or two of the stream, and a smaller species lives about 3-5 meters away from the stream. In this region, these three salamander species are using

different niches within the same habitat

B

the same niche and microhabitat

C

the same landscape but different ecosystems

D

the same habitat but different niches

Q 4.

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Invasive species are dangerous because

A

they are almost all predators, disturbing ecological relationships by eating other species.

B

they carry viruses that spread disease in new ecosystems.

the native species have not evolved with these organisms.

D

they tend to be secretive, going unnoticed in their new ecosystems.

Q 5.

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Protection and preservation of endangered species away from their natural habitat under human care in zoos, nurseries and laboratories is known as

A

In-situ conservation

B

Ex-situ conservation

C

Biodiversity conservation

None of the above

Q 6.

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Protection of biodiversity around the world requires:

basic science to produce government policies and laws that then must be enforced.

B

changes to social structure and political organizations that drive basic science.

C

new technologies and techniques that are still being developed.

D

the introduction of new species into new regions to spread a species range.

Q 7.

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Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called

Keystone species

B

Allopatric species

C

Sympatric species

D

Threatened species

Q 8.

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The diversity and productivity or coral reefs is most similar to that of

A

desert environments

B

a natural prairie.

tropic rain forests

D

a river system.

Q 9.

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The risk of introducing a natural enemy to control an invasive species is that

A

it might drive the invasive species to extinction.

the natural enemy might also become a pest.

C

the natural enemy might evolve into a new species

D

the natural enemy may introduce genetic diversity into the invasive species.

Q 10.

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Biodiversity is important because:

it is necessary to maintain ecosystems.

B

humans can use new sources of food.

C

without certain species, photosynthesis may not be possible.

D

certain species are necessary to provide oxygen in the atmosphere.

Q 11.

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Which of the following represents the greatest conservation of the genetic hank?

A

the human genome center, analyzing the components of the human genome.

seed banks that store seeds of thousands of plants from around the world.

C

the field of proteomics, investigating the many ways the proteins function in organisms.

D

all of the varieties of corn wheat, and rice currently serving as crops.

Q 12.

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

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

B

Kashmir Stag, Cheetah 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

Explanation

Red Panda and Asiatic Wild Ass. are endangered species.

Q 13.

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Which one of the following is included in the world list of biosphere reserves by UNESCO?

A

Kinnaur region

B

Spiti Valley

C

Nallamalai Hills

Sunderbans

Explanation

The Sundarbans is the largest single block of tidal halophytic mangrove forest in the world. The Sundarban forest lies in the vast delta on the Bay of Bengal formed by the super confluence of the Ganges, Padma, Brahmaputra and Meghna rivers across southern Bangladesh. It is a UNESCO World Heritage Site.

Q 14.

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In which one of the following states is Ranganathittu Bird Sanctuary located?

A

Tamil Nadu

B

Kerala

Karnataka

D

Andhra Pradesh

Explanation

Ranganathittu Bird Sanctuary is located in Karnataka.

Q 15.

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Which one of the following is the correct sequence of the given tiger reserves of India from North to South?

Dudwa-Kanha-Indravati-Bandipur

B

Kanha-Bandipur-Dudwa-Indravati

C

Indravati-Kanha-Dudwa-Bandipur

D

Dudwa-Kanha-Bandipur-Indravati

Explanation

1. Dudwa National park - Uttar Pradesh 2. Kanha National Park - Madhya Pradesh 3. Indravati National Park - Chattisgarh 4. Bandipur National Park- Karnataka

Q 16.

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In wildlife conservation which one among the following best defines an ‘endemic species'?

A

When the critical number of a species declines in a forest due to parasitic attack

B

A species which is cosmopolitan and can be commonly found in biosphere

C

An endangered species which is found in a few restricted areas on the Earth

A species confined to a particular region and not found anywhere else

Explanation

An endemic species is one whose habitat is restricted to a particular area. The term could refer to an animal, a plant, a fungus, or even a microorganism. Some of the endemic species in India are Grey-headed Bulbul, Malabar Lark, Nilgiri Flycatcher and Grey Jungle fowl etc.

Q 17.

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Biodiversity is richer in

tropical regions

B

polar regions

C

temperate regions

D

oceans

Explanation

Biodiversity is richer in tropical regions. Biodiversity is a measure of the health of ecosystems. Greater biodiversity implies greater health. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas Polar Regions support fewer species.

Q 18.

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According to IUCN 2004, the total number of plant and animal species described so far is slightly more than

A

5 million

B

7 million

1.5 million

D

0.5 million

Q 19.

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Mark the correct statement

A

Amazonian rain forest has greatest biodiversity on earth

B

According to Robert May estimates, the global species diversity is 7 million

C

Biodiversity is the greatest in tropics

All of these

Q 20.

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Following arrangement is correct from the point of view of decreasing biodiversity in angiosperms (N), fungi (F), pteridophytes (P) and algae (A)

A

N>F>P>A

B

N>F>A>P

C

F>N>P>A

F>N>A>P

Q 21.

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Mam reason behind the destruction of Bio-diversity is :

A

Hunting

B

Soil erosion

C

Green house effect

Destruction of natural habitat

Q 22.

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Project tiger was launched by the recommendation of Indian board of Wildlife (IBWL) in

A

1971

B

1975

1973

D

1972

Q 23.

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Royal Bengal Tiger has been conserved in

A

Kanha National Park

B

Manas National Park

Sundarbans

D

Corbett National Park

Explanation

Sunderbans is the national park of West Bengal.

Q 24.

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First Biosphere Reserve in India was

A

Nanda Devi

B

Created at foot hills of Himalaya

Established in 1986

D

All of these

Explanation

The first biosphere reserve in India was Nilgiri.

Q 25.

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Which of the following natural bounty is used for giving protection to fauna only?

A

Botanical garden

B

National Park

C

Biosphere Reserve

Sanctuary

Explanation

National parks give protection to fauna and flora both.