UPSC questions on Environemnt and Ecology

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UPSC 2011

Question : Biodiversity forms the basis for human existence in the following ways : 
 

1. Soil formation
2. Prevention of soil erosion
3. Recycling of waste
4. Pollination of crops

 

Select the correct answer using the codes given below:
 

A 1, 2 and 3 only

B 2, 3 and 4 only

C 1 and 4 only

D 1, 2, 3 and 4

 

Answer : D

 

Explanation : Biological diversity helps in the formation and maintenance of soil structure and the retention of moisture and nutrient levels. Trees on the other hand, lower the water table and remove deposited salt from the upper soil horizons.

 

 

 

Question : Which one of the following is not a site for in-situ method of conservation of flora? 

A Biosphere Reserve

B Botanical Garden

C National Park

D Wildlife Sanctuary

 

Answer : B

Explanation : In-situ conservation is on-site conservation or the conservation of genetic resources in natural populations of plant or animal species. It is the process of protecting an endangered plant or animal species in its natural habitat, either by protecting or cleaning up the habitat itself, or by defending the species from preadtors. Around 4% of the total geographical area of the country is used for in-situ conservation. The following methods are presently used for in-situ conservation - biosphere reserves, national parks and wild life sanctuaries. Botanical gardens are included under Ex-situ conservation. 

 

 

 

Question : Consider the following statements: 

1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes.
2. Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes.

Which of the statements given above is/are correct?

A 1 only

B 2 only

C Both 1 and 2

D Neither 1 nor 2


Answer : C

Explanation : Biodiversity increases as we move from Poles to the Tropics. Thus localities at lower latitudes have more species than localities at higher latitudes.
Higher you go= colder atmosphere = less biodiversity.

 

 

 

 

Question : Three of the following criteria have contributed to the recognition of Western Ghats-Sri Lanka and Indo-Burma regions as hotspots of biodiversity: 

1. Species richness
2. Vegetation density
3. Endemism
4. Ethno-botanical importance
5. Threat perception
6. Adaptation of flora and fauna to warm and humid conditions

Which three of the above are correct criteria in this context?

 

A 1, 2 and 6

B 2, 4 and 6

C 1, 3 and 5

D 3, 4 and 6


Answer : C

Explanation : To qualify as a hotspot, a region must meet two strict criteria: 
1. It must contain at least 1,500 species of vascular plants (> 0.5 percent of the world’s total) as endemics (endemic = native to a particular habitat) 
2. It must have lost at least 70 percent of its original habitat. 

So we choose Species richness (1) as well as Endemism (3). Along with this Threat perception is necessary (5) to take, because it makes the base of this concept. 

Question : Two important rivers — one with its source in Jharkhand (and known by a different name in Odisha), and another, with its source in Odisha — merge at a place only a short distance from the coast of Bay of Bengal before flowing into the sea. This is an important site of wildlife and biodiversity and a protected area.

Which one of the following could be this?

A Bhitarkanika

B Chandipur-on-sea

C Gopalpur-on-sea

D Simlipal


Answer :  A

Explanation : Bhitarkanika is a unique habitat of Mangrove Forests criss-crossed with numerous creeks and mud flats located in Kendrapara district of Orissa. One of the largest Mangrove Eco systems in India, Bhitarkanika is home to diverse flora and fauna.The Bhitarkanika Mangroves cover an area of 650 km2 in the river delta of the Brahmani and Baitarani rivers.

 

 

 

 

Question : A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal? 


A Indian wild buffalo

B Indian wild ass

C Indian wild boar

D Indian gazelle


Answer :  B

Explanation : Indian wild ass is actually a threatened species available in the Rann of Kutch which is saline and sandy

 

 

 

 

Question : The Himalayan Range is Very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?


A It has a high rainfall that supports luxuriant vegetative growth

B It is a confluence of different bio-geographical zones

C Exotic and invasive species have not been introduced in this region

D It has less human interference


Answer : B

Explanation : The Himalayan Range is very rich in species diversity because of the entire Himalayan region is very diverse bio-geographically. Hence option (B) - It is a confluence of different bio-geographical zones.

Question : In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material? 

1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2. Bioasphalt can be made from non-renewable resources.
3. Bioasphalt can be made from organic waste materials.
4. It is eco-friendly to use bioasphalt for surfacing of the roads.

Which of the statements given above are correct?

A 1, 2 and 3 only

B 1, 3 and 4 only

C 2 and 4 only

D 1, 2, 3 and 4

 

Answer :

Explanation : Bioasphalt is an alternative to asphalt . It is derived from non-petroleum based renewable resources. which include sugar,molasses, rice ,natural tree, vegetable oils,cellulose,coconut waste.corn and potato starches and so on. In view of the drastic climatic changes and pollution non petroleum alternatives are preferred as they are more eco friendly.

It can only be made from renewable sources.  It is made from organic waste and is considered as eco-friendly.

Question : Consider the following:  

1. Carbon dioxide
2. Oxides of Nitrogen
3. Oxides of Sulphur

Which of the above is/are the emission/ emissions from coal combustion at thermal power plants?

A 1 only

B 2 and 3 only

C 1 and 3 only

D 1, 2 and 3


Answer : D

Explanation : The main emissions from coal combustion at thermal power plants are carbon dioxide (CO2), nitrogen oxides, sulfur oxides, chlorofluorocarbons (CFCs), and airborne inorganic particles such as fly ash and soot; CO2, methane, and CFCs are greenhouse gases.

 

 

 

 

Question : The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?

A Presence of prominent tropo-spheric turbulence; and inflow of chlorofluorocarbons

B Presence of prominent polar front and stratospheric’ clouds; and inflow of chlorofluorocarbons

C Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons

D Increased temperature at polar region due to global warming


Answer : B

Explanation : The severe depletion of the Antarctic ozone layer known as the “ozone hole” occurs because of the special atmospheric and chemical conditions that exist there and nowhere else on the globe. The very low winter temperatures in the Antarctic stratosphere cause polar stratospheric clouds (PSCs) to form. Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases (formerly found in aerosol spray cans and refrigerants) are released into the atmosphere. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity

 

 

 

 

Question : Regarding “carbon, credits”, which one of the following statements is not correct?

A The carbon credit system was ratified in conjunction with the Kyoto Protocol

B Carbon credits are awarded to countries or groups that have reduced greenhouse gases below their emission quota

C The goal of the carbon credit system is to limit the increase of carbon dioxide emission

D Carbon credits are- traded at a price fixed from time to time by the United Nations Environment Programme


Answer :

Explanation : Carbon credits mean certificates granting the right to beholder to emit 1 tonne of carbon dioxide or its equivalent. These are generally awarded to groups or countries that have reduced greenhouse gases emissions below their quota. The carbon credit system was ratified in conjunction with Kyoto protocol and is aimed at reducing greenhouse gas emissions.

 

Question : There is a concern: over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon? 

1. Discharge of nutrients from the estuaries.
2. Run-off from the land during the monsoon.
3. Upwelling in the seas.

Select the correct answer from the codes given below:

A 1 only

B 1 and 2 only

C 2 and 3 only

D 1, 2 and 3


Answer : D

Explanation : An algal bloom is a rapid increase or accumulation in the population of algae (typically microscopic) in a water system. Cyanobacteria blooms are often called blue-green algae. Algal blooms may occur both in freshwater as well as marine environments. 
Typically, only one or a small number of phytoplankton species are involved, and some blooms may be recognized by discoloration of the water resulting from the high density of pigmented cell. Algal blooms are the result of an excess of nutrients, particularly some phosphates.The excess of nutrients may originate from fertilizers that are applied to land for agricultural or recreational purposes. They may also originate from household cleaning products containing phosphorus. These nutrients can then enter watersheds through water runoff. Excess carbon and nitrogen have also been suspected as causes. Presence of residual sodium carbonate acts as catalyst for the algae to bloom by providing dissolved carbon dioxide for enhanced photo synthesis in the presence of nutrients. 
When phosphates are introduced into water systems, higher concentrations cause increased growth of algae and plants. Algae tend to grow very quickly under high nutrient availability, but each alga is short-lived, and the result is a high concentration of dead organic matter which starts to decay. The decay process consumes dissolved oxygen in the water, resulting in hypoxic conditions. Without sufficient dissolved oxygen in the water, animals and plants may die off in large numbers.

Harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, (or otherwise harmful phytoplankton such as dinoflagellates ) mechanical damage to other organisms, or by other means. Such blooms often take on a red or brown hue and are known as red tides. HABs are often associated with large-scale marine mortality events and have been associated with various types of shellfish poisonings too.

The frequency and severity of HABs in some parts of the world have been linked to increased nutrient loading from human activities. In other areas, HABs are a predictable seasonal occurrence resulting from coastal upwelling. The growth of marine phytoplankton (both non-toxic and toxic) is generally limited by the availability of nitrates and phosphates, which can be abundant in coastal upwelling zones as well as in agricultural run-off areas. The type of nitrates and phosphates available in the system are also a factor, since phytoplankton can grow at different rates depending on the relative abundance of these substances (e.g. ammonia, urea, nitrate ion).

A variety of other nutrient sources can also play an important role in affecting algal bloom formation, including iron, silica or carbon. Coastal water pollution produced by humans (including iron fertilization) and systematic increase in sea water temperature have also been suggested as possible contributing factors in HABs. Other factors such as iron-rich dust influx from large desert areas such as the Sahara are thought to play a role in causing HABs.

Climate Change can also cause Algal boom. Coastal upwelling is the process by which winds push surface water offshore and deep water moves towards the coast, bringing nutrients from the ocean floor to the surface. Climate change is expected to alter the timing and intensity of coastal upwelling. Along the west coast of the United States, excess nutrients delivered by upwelling might lead to more algal blooms.
Some algal blooms on the Pacific coast have also been linked to natural occurrences of large-scale climatic oscillations such as El Niño events.
Climate change might lead to more droughts, which make freshwater saltier. This can cause marine algae to invade freshwater ecosystems.
Algae need carbon dioxide to survive. Higher levels of carbon dioxide in the air and water can lead to rapid growth of algae, especially toxic blue-green algae that can float to the surface of the water.
Climate change might affect rainfall patterns, leading to alternating periods of drought and intense storms. This can cause more nutrient runoff into water bodies, feeding more algal blooms.
Scientists predict that sea level could rise up to one meter by the year 2100. This would create more shallow and stable coastal water, conditions that are perfect for the growth of algae

Warmer water due to climate change might favor harmful algae in a number of ways:

1.    Toxic blue-green algae prefer warmer water.
2.    Warmer temperatures prevent water from mixing, allowing algae to grow thicker and faster.
3.    Warmer water is easier for small organisms to move through and allows algae to float to the surface faster.
4.    Algal blooms absorb sunlight, making water even warmer and promoting more blooms.

 

 

 

 

Question : The “Red Data Books” published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of:

1. Endemic plant and animal species present in the biodiversity hotspots,
2. Threatened plant and animal species.
3. Protected sites for conservation of nature and natural resources in various countries.

Select the correct answer using the codes given below:

A 1 and 3

B 2 only

C 2 and 3

D 3 only

 

Answer :  B

Explanation : Red data book is the document established by IUCN for documenting the rare and endangered species of plants, animals, fungi and also a few local species that exist within a state or country.

 

 

Question : Human activities in the recent past have Caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of : 

1. its escape into the outer stratosphere.
2. the photosynthesis by phyto-plankton in the oceans.
3. the trapping of air in the polar ice caps.

Which of the statements given above is/are correct?

A 1 and 2

B 2 only

C 2 and 3

D 3 only


Answer :  C

Explanation : Phytoplankton are a very important part of the ocean foodchain. They make their own food by photosynthesis for which they utilize atmospheric carbon dioxide.

Climate change is a fact, and most of the warming is caused by human activity. The Arctic is now so warm that the extent of sea ice has decreased by about 30 percent in summer and in winter, sea ice is getting thinner.
New research shows that sea ice removes carbon dioxide from the atmosphere. If Arctic sea ice is reduced, we may therefore be facing an increase of atmospheric concentration of carbon dioxide

 

Question : In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the:

1. decomposer microorganisms to the surface.
2. nutrients to the surface.
3. bottom-dwelling organisms to- the surface.

Which of the statements given above is/are correct?

A 1 and 2

B 2 only

C 2 and 3

D 3 only


Answer : C

 

Explanation : Upwelling brings nutrient -rich water towards the ocean surface replacing the warmer and usually nutrient depleted surface water. This is to do with the Phytoplankton and nothing to do with the decomposer microorganisms

 

Question : With reference to India, consider the following Central Acts: 

1. Import and Export (Control) Act, 1947
2. Mining and Mineral Development (Regulation) Act, 1957
3. Customs Act, 1962
4. Indian Forest Act, 1927

Which of the above Acts have relevance to/bearing on the biodiversity conservation in the country?

A 1 and 3 only

B 2, 3 and 4 only

C 1, 2, 3 and 4

D None of the above Acts

 

Answer : C

Explanation : All four Acts are related to biodiversity. Import and export of GMOs or exotic species is prohibited whereas certain medicial plants are subjected to high custom duties to regulate their trade. Minus regulation and forest conservation anyway involve provisions related to biodiversity conservation

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UPSC 2012

Question: Consider the following kinds of organisms :

 

1. Bacteria
2. Fungi
3. Flowering plants

Some species of which of the above kinds of organisms are employed as biopesticides?

A 1 only

B 2 and 3 only

C 1 and 3 only

D 1, 2 and 3

Answer : D

Explanation : Biopesticides are certain types of pesticides derived from such natural materials as animals, plants, bacteria, and certain minerals. For example, canola oil and baking soda have pesticidal applications and are considered biopesticides. Viruses, bacteria, fungi, protozoa, mites, insects, and flowers have all been used
as biopesticides.

Question: Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are
correct? 

1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.
3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.

Select the correct answer using the codes given below :

A 1 only

B 2 and 3 only

C 1 and 3 only

D 1, 2 and 3

 

Answer : A

Explanation : Biomass gasification is a new technology in which biomass (renewable organic resource like agriculture crop residues, forest residues, special crops grown particularly for energy use, organic  municipal solid waste and animal waste) is converted to hydrogen and other products without combustion using heat, steam and oxygen. As such Statement (1) Coconut shells, groundnut shells and rice husk can be used in biomass gasification is correct. Statement (2) is incorrect because of the use of the word "only".
Statement (3) is incorrect because some new IC engines are using biomass gasification 

Question: Consider the following areas:

1. Bandipur
2. Bhitarkanika
3. Manas
4. Sunderbans

Which of the above are Tiger Reserves?

A 1 and 2 only

B 1, 3 and 4 only

C 2, 3 and 4 only

D l, 2, 3 and 4

 

Answer : B

Explanation : Bandipur National Park, a tiger reserve is located in the south Indian state of Karnataka. 
Manas National Park or Manas Wildlife Sanctuary is a National Park, UNESCO Natural World Heritage site, a Project Tiger Reserve, an Elephant Reserve and a Biosphere Reserve in Assam. 
The Sundarban National Park is a National Park, Tiger Reserve, and a Biosphere Reserve in India. It is a part of the Sundarbans on the Ganges Delta of India and Bangladesh. 
Bhitarkanika National Park is a national park located in the Kendrapara District Odisha, which is not specifically for Tiger reserve

 

Question: In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

A Biosphere Reserves

B National Parks

C Wetlands declared under Ramsar Convention

D Wildlife Sanctuaries
 

Answer : B

Explanation : In India, local people are not allowed to collect and use the biomass in National Parks.
This is so because National Parks are state property and are only used by the government. They are not for public use. These parks are only used for tourism and reservation purposes.

 

Question: Consider the following kinds of organisms :

1. Bat
2. Bee
3. Bird

Which of the above is/are pollinating agent/agents?

A 1 and 2 only

B 2 only

C 1 and 3 only

D 1, 2 and 3

Answer : D

Explanation : Bees, bats and birds are the biotic pollinating agents. The majority of pollinators are biotic agents such as insects (like bees, flies, and butterflies), bats, birds, and other animals. Other plant species are pollinated by abiotic agents, such as wind and water.

 

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

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

B Kashmir Stag, Cheetal, 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

Answer : A

Explanation : Option (A) has the list of all endangered species 

Elimination of other options . 
(B) Kashmir Stag is not endangered 
(C) Saras (crane) is not endangered
(D) Cheetal (spotted deer) is not endangered

 

 

Question: Which of the following can be threats to the biodiversity of a geographical area?

1. Global warming
2. Fragmentation of habitat
3. Invasion of alien species
4. Promotion of vegetarianism

Select the correct answer using the codes given below :

A 1, 2 and 3 only

B 2 and 3 only

C 1 and 4 only

D 1, 2, 3 and 4

Answer : A

Explanation : Refer to the PDF here - http://www.indiaenvironmentportal.org.in/files/National_Biodiversity_Action_Plan.pdf
From the table of contents, you can see that Global warming, fragmentation of habitat and invasion of alien species are a threat.

 

Question: Consider the following :

 

1. Black-necked crane
2. Cheetah
3. Flying squirrel
4. Snow leopard

Which of the above are naturally found in India?


A 1, 2 and 3 only

B 1, 3 and 4 only

C 2 and 4 only

D 1, 2, 3 and 4

Answer : D

Explanation : Black-necked crane is commonly found in Tibetan and trans-Himalayan region. In winters they migrate to less colder regions of Indian Himalayas.
Cheetah is an extinct species. They have gone extinct during pre-independence era due to the fact that they were hunted down by various Indian kings and British officers.
Flying Squirrels are found in many Indian forests.
Snow leopard is an ‘endangered’ specie found in the Himalayan ranges.

 

Question: A particular State in India has the following characteristics :

It is located on the same latitude which passes through northern Rajasthan.
It has over 80% of its area under forest cover.
Over 12% of forest cover constitutes Protected Area Network in this State.

Which one among the following States has all the above characteristics?

A Arunachal Pradesh

B Assam

C Himachal Pradesh

D Uttarakhand

Answer : A

Explanation : Himachal Pradesh is located north of Rajasthan, so it can't be on the same latitude.
Only in North East and Andaman can 80% of area be under forests and so Himachal and Uttarakhand ruled out. Forest area in Assam can not be >80% since a  large part of Assam is valley. It’s forest area is actually <50%
12% of the total area of Arunachal Pradesh and 15% of the total forest cover in being protected by the Department of Environment and Forests of Arunachal Pradesh.

 

 

Question: With reference to the wetlands of India, consider the following statements :

1. The country’s total geographical area under the category of wetlands is recorded more in Gujarat as compared to other States.
2. In India, the total geographical area of coastal wetlands larger than that of wetlands.

Which of the statements given above is/are correct?

A 1 only

B 2 only

C Both 1 and 2

D Neither 1 nor 2

Answer : A

Explanation : Wetlands cover around 3% of the total land area of India. Gujarat occupies around 3 million hectares of wetlands out of India’s total 10 million hectares of wetland area. India has total 27,403 wetlands, of which 23,444 are inland wetlands and 3,959 are coastal wetlands. However area wise the coastal wetlands occupy an estimated 6,750 sq km, which is more than the inland wetlands.

 

 

Question: The acidification of oceans is increasing. Why is this phenomenon a cause of concern? 

1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected.

Which of the statements given above is /are correct?

A 1, 2 and 3 only

B 2 only

C 1 and 3 only

D 1, 2, 3 and 4

Answer : D

Explanation : 2 is correct since corals have calcium Skelton, acid will dissolve that skeleton
1 is also true with similar logic, calcareous phytoplankton have calcium Skelton will be dissolved by acid
4 Marine phytoplankton releases sulphur compounds into the atmosphere that contribute to cooling the planet. But ocean acidification could hinder this process.
Acidification would lead certain marine organisms to emit less of the sulphur compounds that help to seed the formation of clouds and so keep the planet cool.
Statements 1,2 and 4 correct and answer is Option D

 

Question: The Millennium Ecosystem Assessment describes the following major categories of ecosystem services-provisioning, supporting, regulating, preserving and cultural.

 

Which one of the following is supporting service? 

A Production of food and water

B Control of climate and disease

C Nutrient cycling and crop pollination

D Maintenance of diversity

Answer : C

Explanation : Production of food and water comes into the category of Provisioning services of ecosystem.

Control of climate and disease is in the category of Regulating services of ecosystem.

Nutrient cycling and pollination is in the category of Supporting services.
These services are essential for all other services and for basic sustenance of ecosystem.

Maintenance of diversity is in the category of cultural services. These are non material features and benefits of ecosystem.

Additional read - https://en.wikipedia.org/wiki/Ecosystem_service#Supporting_services  (under categorization)

 

 

Question: What would happen if phytoplankton of an ocean is completely destroyed for some reason? 

1. The ocean as a carbon sink would be adversely affected.
2. The food chains in the ocean would be adversely affected.
3. The density of ocean water would drastically decrease.

Select the correct answer using the codes given below :

A 1 and 2 only

B 2 only

C 3 only

D 1, 2 and 3

Answer : A

Explanation : Phytoplankton which live on the ocean surfaces are marine algae, which get their nutrients through photosynthesis. In the process, they use up carbon dioxide and release oxygen. They are the most important source of food for higher order animals. So Statement 1 and 2 are correct

Statement 3 - The use of the word drastically is questionable . Oceanographers have not previously considered plankton as contributors to ocean density gradients, which are conventionally calculated from temperature and salinity alone in the upper ocean. However they found that phytoplankton density gradients were in some cases comparable to the physical density gradients. As small density gradients drive some ocean currents, and help control gas and heat exchange between ocean and
atmosphere, plankton are considered undescribed variable influencing these processes.

 

Therefore correct answer is A.

 

 

Question: What is the role of ultraviolet (UV) radiation in the water purification systems?

1. It inactivates /kills the harmful microorganisms in water.
2. It removes all the undesirable odours from the water.
3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

Which of the statements given above is/are correct?

A 1 only

B 2 and 3 only

C 1 and 3 only

D 1, 2 and 3

Answer : A

Explanation : A UV radiation is water purifier treats micro-biologically unsafe water with germicidal ultraviolet light. The UV wavelength scrambles the DNA of living organisms in the water, so they can no longer reproduce and make you sick. If you drink bacteria-infested water, the organisms can embed in your digestive tract and replicate.

Hence Option A is correct

 

Question: Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used 

1. in the production of plastic foams
2. in the production of tubeless tyres
3. in cleaning certain electronic components
4. as pressurizing agents in aerosol cans

Which of the statements given above is/are correct?

A 1, 2 and 3 only

B 4 only

C 1, 3 and 4 only

D 1, 2, 3 and 4

Answer : C

Explanation : Chlorofluorocarbons or CFCs were used  - 
-as pressurizing agents in aerosol cans, 
-for rigid foam insulation such as polyurethane is produced by injecting CFCs into a liquid mass of plastic polymer, thereby creating the bubbles that provide insulating capabilities
-for cleaning electronic equipment.

 

 

Question: Government of India encourages the cultivation of ‘sea buckthorn’. What is the importance of this plant? 
 

1. It helps in controlling soil erosion and in preventing desertification.
2. It is a rich source of biodiesel.
3. It has nutritional value and is well-adapted to live in cold areas of high altitudes.
4. Its timber is of great commercial value.

Which of the statements given above is /are correct?

A 1 only

B 2, 3 and 4 only

C 1 and 3 only

D 1, 2, 3 and 4

 

Answer : C
 

Explanation : Government of India encourages the cultivation of sea buckthorn the importance of this plant is it helps in controlling soil erosion and its prevent desertification also it has a nutritional value and well adapted to live in cold regions.

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UPSC 2013

Question : 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.

A 1 and 3 only

B 2, 4 and 5 only

C 1, 3 and 5 only

D 1, 2, 3, 4 and 5

Answer : C


Explanation : please refer to https://www.wqa.org/learn-about-water/common-contaminants for the list of common pollutants
Sorbitol (Item 2) used as artificial sweetener and laxative. Formaldehyde (Item
 4) used in coating, laminating etc. Neither of them not as famous water pollutants as arsenic and fluoride.

 

 

Question : In the grasslands, trees do not replace the grasses as a part of an ecological succession because of : 

A insects and fungi

B limited sunlight and paucity of nutrients

C water limits and fire

D None of the above

Answer : C

Explanation : Ecological succession is the process that describes how the structure of a biological community (that is, an interacting group of various species in a desert, forest, grassland, marine environment, and so on) changes over time. The two main types are primary succession and secondary succession

In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. 
In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.

The stages of primary succession include pioneer microorganisms, plants (lichens and mosses), grassy stage, smaller shrubs, and trees. Animals begin to return when there is food there for them to eat. When it is a fully functioning ecosystem, it has reached the climax community stage. That means trees eventually replace the grass or the grassy stage. 

However in grasslands the trees do no replace the grasses because 


Grass ecosystems are an early stage of succession in regions where the mature ecosystems are forests. However, grass ecosystems are climax ecosystems in grassland regions, where there is not enough rainfall to support a forest. (e.g. in our option C water limits and forest fire) (ref. Page 149 Human Ecology: Basic Concepts for Sustainable Development By Gerald G G Marten) . Ecological succession of a grassland is desert. (Page 3.17 Environmental Studies By Anjali Bagad)

Two factors for evolution of temperate grassland biome, 
i) Extreme continental climate with limited supply of water due to low rainfall 

ii) human activities mainly burning of vegetation.(Ref. Page 619, Physical Geography by Savindra Singh)
 

Therefore option C is correct

 

 

 

Question : Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity? 

A Oceans, lakes, grasslands, mangroves

B Mangroves, oceans, grasslands, lakes

C Mangroves, grasslands, lakes, oceans

D Oceans, mangroves, lakes, grasslands

Answer : C

Explanation : This is a tricky question and as per official UPSC key, the answer is C.

Here by productivity they are referring to the rate of organic matter or biomass production. The productivity of an ecosystem is of two types: primary and secondary.

According to the source - https://ci.coastal.edu/~sgilman/770productivitynutrients.htm

- The average ocean productivity is about 50 grams carbon per square meter per year. The productivity of the open ocean (ocean away from coasts) is comparable to desert production. This means that most of the ocean, or about 90%, is essentially desert.

- Average land productivity is 160 grams carbon per square meter per year.

Hence Ocean must be the least productive and the only option confirming this is Option C

 

 

Question : Acid rain is caused by the pollution of environment by 

A carbon dioxide and nitrogen

B carbon monoxide and carbon dioxide

C ozone and carbon dioxide

D nitrous oxide and sulphur dioxide

Answer : D

Explanation : Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrous oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

 

 

Question : 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?


A 1 only

B 1 and 2 only

C 1, 2 and 3

D None

 

Answer : A

Explanation : By definition - A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

1 is correct because food chain shows the sequence or order in which organism feed

2 is incorrect because food chain means passing of energy from one species to another. Thus cannibalism will stop a food chain and it will not be found within the populations of the species

3. is incorrect because food chain doesn't show the numbers but merely the flow of energy

Therefore only option A is correct

 

 

Question : Consider the following organisms: 

1. Agaricus
2. Nostoc
3. Spirogyra

Which of the above is / are used as biofertilizer / biofertilizers

A 1 and 2

B 2 only

C 2 and 3

D 3 only

Answer : B

Explanation : Agaricus is a genus of mushrooms containing both edible and poisonous species, not an bio fertilizer.

Nostoc fixes atmospheric nitrogen into ammonia, which may then be used or converted to a form suitable for plant growth. Thus Nostoc is a sustainable biofertilizer.

The algae grow on their own in the rice fields, but all of them are not beneficial to crop. The green algae like Srirogyra compete with the crop for nutrient and reduce tilering in the crop. Therefore it is not a biofertilizer.

 

 

Question : 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? 


A Ecotone

B Ecological niche

C Habitat

D Home range

Answer : B

Explanation : Ecological niche is a term for the position of a species within an ecosystem, describing both the range of conditions necessary for persistence of the species, and its ecological role in the ecosystem.

The ecological niche describes how a species interacts within an ecosystem. The niche of a species depends on both biotic and abiotic factors, which affect the ability of a species to survive and endure.

Biotic factors affecting a species' niche include food availability and predators. Abiotic factors affecting ecological niche include temperature, landscape characteristics, soil nutrients, light and other non-living factors.

An example of an ecological niche is that of the dung beetle. The dung beetle, as its name suggests, consumes dung both in larval and adult form. Dung beetles store dung balls in burrows, and females lay eggs within them.

This allows hatched larvae immediate access to food. The dung beetle in turn influences the surrounding environment by aerating soil and rereleasing beneficial nutrients. Therefore, the dung beetle performs a unique role in its environment.

 

Question : Photochemical smog is a resultant of the reaction among: 

A NO2, 03 and peroxyacetyl nitrate in the presence of sunlight

B CO, 02 and peroxyacetyl nitrate in the presence of sunlight

C CO, CO2 and N02 at low temperature

D High concentration of N02, O3 and CO in the evening

Answer : A

Explanation : Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides of the atmosphere. 
To begin the chemical process of photochemical smog development the following conditions must occur.
1. sunlight
2. the production of oxides of nitrogen (NOx)
3. the production of volatile organic compounds
4. the temperature greater than 18 degrees celsius. 
reactions :
O3 + NO  ------------>   NO2 + O2
NO + RO2 ---------------->  NO2 + other products
NO2 + sunlight ----------->  NO + O
O + O2 ------------> O3
NO2 + R  --------------------> peroxyacetyl nitrate.

 

Question : With reference to the food chains in ecosystem, 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.

A 1 only

B 2 and 3 only

C 1 and 3 only

D 1, 2 and 3


Answer : B

Explanation : Decomposers are organisms that break down dead or decaying organisms. Bacteria and Fungi are considered as decomposer organisms. Viruses invade other organisms, but they're not decomposers.
Bacteria are important decomposers; they can break down any kind of organic matters. Fungi are primary decomposers, they not only decompose the surface organisms but they can also penetrate deep into the organic matters.

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Question : Which one of the following is the process involved in photosynthesis?
 

A. Potential energy is released to form free energy
B. Free energy is converted into potential energy and stored
C. Food is oxidized to release carbon dioxide and water
D. Oxygen is taken, and carbon dioxide and water vapour are given out

Answer : B

Explanation : Photosynthesis is the process in which plants make food using co2 and sunlight  and the process also releases oxygen . Since energy is being stored in the form of food, the process converts free energy (of the sun) into potential energy 

 

 

Question : Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?
 

1. Volcanic action
2. Respiration
3. Photosynthesis
4. Decay of organic matter

Select the correct answer using the code given below.

A. 1 and 3 only
B. 2 only
C. 1, 2 and 4 only
D. 1, 2, 3 and 4

Answer : C

Explanation : Statement 1 - Volcanoes emit carbon dioxide during eruptions and also through magma which flows underground
Statement 2 - Co2 is released during respiration and it is a common knowledge
Statement 3 - plants make food using co2 and sunlight  and the process also releases oxygen. Since CO2 is absorbed from the atmosphere during photosynthesis, it is not released
Statement 4 - Organic matter decay releases carbon back into the atmosphere as CO2

 

Question : In India, the problem of soil erosion is associated with which of the following?

1. Terrace cultivation
2. Deforestation
3. Tropical climate

Select the correct answer using the code given below.

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

Answer : B

Explanation : Statement 1 - terrace farming prevents soil erosion as it binds the soil together through food cultivation in hilly areas
Statement 2 - Deforestation leading to soil erosion is a common knowledge
Statement 3 - Tropical climate with heavy rainfall can lead to soil erosion.

Thus Answer is B 

 

Question : Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of

A. algae and bacteria
B. algae and fungi
C. bacteria and fungi
D. fungi and mosses

Answer : B

Explanation : Lichen is actually a stable symbiotic association between a fungus and algae and/or cyanobacteria. The carbon required by the lichen is provided by algae or cyanobacteria, which are photosynthetic

 

Question : The most important strategy for the conservation of biodiversity together with traditional human life is the establishment of 

A. biosphere reserves
B. botanical gardens
C. national parks
D. wildlife sanctuaries

Answer : A

Explanation : Biosphere reserves include terrestrial, marine and coastal ecosystems. Each site promotes solutions reconciling the conservation of biodiversity with its sustainable use. Biosphere reserves are an ecosystem with plants and animals of unusual scientific and natural interest.

Their main objective is to conserve diversity and integrity of plants animals and microorganisms.

 

Question : With reference to ‘Eco-Sensitive Zones’, which of the following statements is/are correct?

1. Eco-Sensitive Zones are the areas that are declared under the Wildlife (Protection) Act, 1972.
2. The purpose of the declaration of Eco-Sensitive Zones is to prohibit all kinds of human activities, in those zones except agriculture.

Select the correct answer using the code given below.

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Answer : D

Explanation : Eco sensitive zones are declared under Environment (Protection) Act, 1986 (not under Wildlife (Protection) Act, 1972 so Statement 1 is eliminated). 
Eco sensitive zones are area in and around National Park and sanctuaries which are considered as eco fragile zones. There are some activities allowed in these areas like cottage industries, erection of telecom and electricity wires, tourism, hot-air balloons, tourism and so on (so its not just limited to agriculture and Statement 2 is also eliminated).

 

Question : Consider the following pairs

1. Dampa Tiger Reserve : Mizoram
2. Gumti Wildlife Sanctuary : Sikkim
3. Saramati Peak : Nagaland

Which of the above pairs is /are correctly matched?

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

Answer : C

Explanation : Gumti Wildlife Sanctuary is in Tripura 

 

 

 

Question : Wetland locations

Wetlands                                                        Confluence of rivers

 

Harike wetland                                                           Beas and Satluj
Keolado Ghana National Park                                   Banas and Chambal
Kolleru Lake                                                                Musi and Krishna


Which of the above pairs is/are correctly matched? 

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

Answer : A

Explanation : Statement 1 is correct
Statement 2 - Keolado Ghana National Park is Situated at the confluence of the Gambhir and Banganga rivers in the Bharatpur district of Rajasthan
Statement 3 - Kolleru Lake is a  Confluence of Musi and Krishna

 

 

Question : Which of the following have coral reefs?

1. Andaman and Nicobar Islands
2. Gulf of Kutch
3. Gulf of Mannar
4. Sunderbans

Select the correct answer using the code given below.

A. 1, 2 and 3 only
B. 2 and 4 only
C. 1 and 3 only
D. 1, 2, 3 and 4

Answer : A

Explanation : The Coral reefs in India are mainly restricted to the Andaman and Nicobar Islands, Gulf of Mannar, Gulf of Kutch, Palk Strait and the Lakshadweep islands.

Sundarbans have Mangroves and not coral reefs

 

Question : Consider the following:

1. Bats
2. Bears
3. Rodents

The phenomenon of hibernation can be observed in which of the above kinds of animals?

A. 1 and 2 only
B. 2 only
C. 1, 2 and 3
D. Hibernation cannot be observed in any of the above

Answer : C

Explanation : Bats begin hibernating when the cold weather drives the insects away, typically around October and November, and emerge from hibernation in March
Bears hibernate during winter, but not necessarily sleeping the whole time.
Rodents also hibernate 

 

Question : Among the following organisms, which one does not belong to the class of other three?

 

A Crab
B Mite
C Scorpion
D Spider

Answer : A

Explanation : Mite, Scorpion and Spider belong to Arachnida class
Crab belongs to crustacean

 

 

Question : Which one of the following is the correct sequence of a food chain?

A. Diatoms-Crustaceans-Herrings
B. Crustaceans-Diatoms-Herrings
C. Diatoms-Herrings-Crustaceans
D. Crustaceans-Herrings-Diatoms

Answer : A

Explanation : Diatoms are autotrophs which prepare their own food. Crustaceans are herbivorous animals which feed on diatoms. Herrings are carnivorous animals which feed on Crustaceans.

 

Question : If you travel through the Himalayas, you are Likely to see which of the following plants naturally growing there?

1. Oak
2. Rhododendron
3. Sandalwood

Select the correct answer using the code given below

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

Answer : A

Explanation : Oak tree in India are mostly found in the Himalayan region along with pine forest
Rhododendron are also found in the Himalayas
Sandalwood is found in tropical decidous forests or monsoon forests which are found in western ghats, deccan plateu, northern plains and foot hills of Himalayas (not in Himalayas). Hence A is correct

 

Question : If you walk through countryside, you are likely to see some birds stalking alongside the cattle to seize the insects, disturbed by their movement through grasses, Which of the following is/are such bird/birds?

1. Painted Stork
2. Common Myna
3. Black-necked Crane

Select the correct answer using the code given below.

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

Answer : B

Explanation : Painted stork is a fish eating bird and Black Necked Crane feeds on plants and insects in the wild and is it not common of them to feed on insects in the fields. Common myna is an aooportunistic feeder. They feed on insects disturbed by cattle

 

Question : Other than poaching, what are the possible reasons for the decline in the population of Ganges River Dolphins?

1. Construction of dams and barrages on rivers
2. Increase in the population of crocodiles in rivers
3. Getting trapped in fishing nets accidentally
4. Use of synthetic fertilizers and other agricultural chemicals in crop-fields in the vicinity of rivers

Select the correct answer using the code given below.

A. 1 and 2 only
B. 2 and 3 only
C. 1, 3 and 4 only
D. 1, 2, 3 and 4

Answer : C

Explanation : Statements1,3 and 4 are mentioned by WWF . Refer to this article on their website -https://www.worldwildlife.org/species/ganges-river-dolphin

No references found on Statement 2 (crocodiles). Therefore the correct answer is C

 

With reference to two non-conventional energy sources called ‘coal bed methane’ and ‘shale gas’, consider the following ‘statements:

1. Coal bed methane is the pure methane gas extracted from coal seams, while shale gas is a mixture of propane and butane only that can be extracted from fine-grained sedimentary rocks.
2. In India abundant coal bed methane sources exist, but so far no shale gas sources have been found.

Question : Which of the statements given above is/are correct?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Answer : D

Explanation : Statement 1 is incorrect - Shale gas consists mainly of methane. Other constituents include hydrocarbons like ethane, propane, and butane, and it also contains carbon dioxide, nitrogen, and hydrogen sulfide.

Statement 2 is incorrect - India has identified six basins as areas for shale gas exploration: Cambay (Gujarat), Assam-Arakan (North East), Gondwana (Central India), Krishna Godavari onshore (East Coast), Cauvery onshore, and Indo-Gangetic basins.

 

 

Question : In India, cluster bean (Guar) is traditionally used as a vegetable or animal feed, but recently the cultivation of this has assumed significance. Which one of the following statements is correct in this context?

A. The oil extracted from seeds is used in the manufacture of biodegradable plastics
B. The gum made from its seeds is used in the extraction of shale gas
C. The leaf extract of this plant has the properties of anti-histamines
D. It is a source of high quality biodiesel

Answer : B

Explanation : It is used in hydraulic fracturing which is used for the extraction of Shale gas. 
Adding guar bean powder (also known as guar gum) to the water increases its viscosity and makes high-pressure pumping and the fracturing process more efficient.

 

 

Question : With reference to technologies for solar power production, consider the following statements:

1. ‘Photovoltaics’ is a technology that generates electricity by direct conversion of light into electricity, while ‘Solar Thermal’ is a technology that utilizes the Sun’s rays to generate heat which is further used in electricity generation process.
2. Photovoltaics generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC).
3. India has manufacturing base for Solar Thermal technology, but not for Photovoltaics.

Which of the statements given above is / are correct?

A. 1 only
B. 2 and 3 only
C. 1, 2 and 3
D. None

Answer : A

Explanation : Photovoltaic technology convert sunlight directly into electricity. Photovoltaics (often shortened as PV) gets its name from the process of converting light (photons) to electricity (voltage), which is called the photovoltaic effect. photovoltaic effect produces a direct current (DC) under solar illumination owing to the directional separation of light‐excited charge carriers at the p–n junction, with holes flowing to the p‐side and electrons flowing to the n‐side

A solar thermal system works by harnessing the sun's energy and converting it into heat which can then be used for electricity. It also generates DC current. 

India has both Solar Thermal technology and Photovoltaic technology manufacturing bases. Recently, Adani Green Energy Ltd that has a 1.5 GW solar Photo Voltaic cell and modules manufacturing capacity bagged a manufacturing-linked solar contract, that entails setting up 2 GW of additional solar cell and module manufacturing capacity.

 

 

Question : There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why?

1. They can accumulate in the environment, and contaminate water and soil.
2. They can enter the food chains.
3. They can trigger the production of free radicals.

Select the correct answer using the code given below.

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

Answer : D

Explanation : Statement 1 is possible . Please refer to this writeup for more details - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5803285/

Statement 1 is correct . Please refer to this writeup for more details - https://link.springer.com/article/10.1007/s42452-019-1412-5?shared-article-renderer

Statement 3 is also correct. Experimental studies show that nanoparticles can trigger the production of free radicals. The chronic release of such reactive molecules can lead to tissue degeneration. Most studies have tested very high concentrations of nanoparticles over relatively short exposure times.
Additional read - https://www.nanowerk.com/nanoparticles_free_radicals_and_oxidative_stress.php#:~:text=Experimental%20studies%20show%20that%20nanoparticles,over%20relatively%20short%20exposure%20times.

 

 

Question : Which of the following are some important pollutants released by steel industry in India?


1. Oxides of sulphur
2. Oxides of nitrogen
3. Carbon monoxide
4. Carbon dioxide

Select the correct answer using the code given below.

A. 1, 3 and 4 only
B. 2 and 3 only
C. 1 and 4 only
D. 1,2, 3 and 4

Answer : D

Explanation : In steel furnace, coke reacts with iron ore, releasing iron and generating CO and CO2 gases. Due to use of coal, pollutants such as SOx and NOx are released, thus all are correct options.

 

 

Question : Brominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use?

1. They are highly resistant to degradation in the environment.
2. They are able to accumulate in humans and animals.

Select the correct answer using the code given below.

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Answer : C

Explanation : The widespread production and use of BFRs has strong evidence of increasing contamination of the environment, wildlife, and people; and limited knowledge of potential effects heighten the importance of identifying emerging issues associated with the use of BFRs.

Source - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1241790/#:~:text=The%20widespread%20production%20and%20use,with%20the%20use%20of%20BFRs.

 

Question : Consider the following countries:

1. Denmark
2. Japan
3. Russian Federation
4. United Kingdom
5. United States of America

Which of the above are the members of the ‘Arctic Council ‘?

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

Answer : D

Explanation : The Arctic Council consists of the eight Arctic States: Canada, Denmark, Finland, Iceland, Norway, Russia, Sweden and the United States. So, Japan and UK not members.India is also an Observer to the Arctic Council. Hence D is correct

 

Question : With reference to ‘Global Environment Facility’, which of the following statements is/are correct?

A. It serves as financial mechanism for ‘Convention on Biological Diversity’ and ‘United Nations Framework Convention on Climate Change’.
B. It undertakes scientific research on environmental issues at global level
C. It is an agency under OECD to facilitate the transfer of technology and funds to underdeveloped countries with specific aim to protect their environment.
D. Both A and B

Answer : A

Explanation : Option A is correct . Please refer to the GEF webpage - https://www.thegef.org/news/gef-and-convention-biological-diversity
Option B is incorrect (and so Option D too ) - It merely finances the projects but doesn't directly undertake scientific research.
Option C is incorrect as it comes under World Bank.

 

 

Question : If a wetland of international importance is brought under the ‘Montreux Record’, what does it imply?

A. Changes in ecological character have occurred, are occurring or are likely to occur in the wetland as a result of human interference.
B. The country in which the wetland is located should enact a law to prohibit any human activity within five kilo meters from the edge of the wetland
C. The survival of the wetland depends on the cultural practices and traditions of certain communities living in its vicinity and therefore the cultural diversity therein should not be destroyed
D. It is given the status of ‘World Heritage Site’

Answer : A

Explanation : Please refer to https://www.cbd.int/doc/meetings/pa/wscbpa-wanafr-01/other/wscbpa-wanafr-01-presentation-06-en.pdf
In the 11th slide, you would see that Montreux Record: Record of Ramsar Sites “where changes in ecological character have occurred, are occurring or are likely to occur.”

 

 

Question : With reference to a conservation organization called Wetlands International’, which of the following statements is/are correct?

1. It is an intergovernmental organization formed by the countries which are signatories to Ramsar Convention.
2. It works at the field level to develop and mobilize knowledge, and use the practical experience to advocate for better policies.

Select the correct answer using the code given below.

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

Answer : B

Explanation : Statement 1 is incorrect - Wetlands International was formed much before Ramsar Convention although both are in partenership. Wetlands International was formed in 1954 and Ramsar convention was signed in 1971.

Statement 2 is correct - As per their official website (link - https://www.wetlands.org/about-us/ ) "We work at the field level to develop and mobilise knowledge, and use this practical experience to advocate for better policies."

 

 

Question : Consider the following international agreements:

1. The International Treaty on Plant Genetic Resources for Food and Agriculture
2. The United Nations Convention to Combat Desertification
3. The World Heritage Convention

Which of the above has / have a bearing on the biodiversity?

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

Answer : D

Explanation : The Internation Treaty on Plant Genetic Resources for Food and Agriculture (IT PGRFA), popularly known as the International Seed Treaty is a comprehensive international agreement in harmony with the convention on biological diversity, which aims at guaranteeing security through the conservation.

As per United Nations Convention to Combat Desertification (UNCCD) website, The UNCCD collaborates closely with the other two Rio Conventions - The Convention on Biological Diversity (CBD) as well as the United Nations Framework Convention on Climate Change (UNFCCC)

The World Heritage Convention is one of the most important global conservation instruments which was created in 1972. Its primary mussion is to identify and protect the world's natural and cultural heritage and conservation of biological diversity considered to be of Outstanding Universal Value. 

 

Question : The scientific view is that the increase in global temperature should not exceed 2 °C above pre-industrial level. If the global temperature increases beyond 3°C above the pre-industrial level, what can be its possible impact/impacts on the world?

1. Terrestrial biosphere tends toward a net carbon source
2. Widespread coral mortality will occur.
3. All the global wetlands will permanently disappear.
4. Cultivation of cereals will not be possible anywhere in the world.

Select the correct answer using the code given below.

A. 1 only
B. 1 and 2 only
C. 2, 3 and 4 only
D. 1, 2, 3 and 4,

Answer : B

Explanation : As per IPCC report (IPCC-WG-II, 2007 https://www.ipcc.ch/site/assets/uploads/2018/03/ar4_wg2_full_report.pdf), beyond 30C rise in global temperature above the pre-industrial level will lead to: 

Upto 30% of species at increasing risk of extinction,wide spread coral mortality,

Terrestrial biosphere tends toward a net carbon source Increasing species range shifts and wildfire risk,

Ecosystem changes due to weakening of the meridional overturning circulation. 

So Statements 1 and 2 are correct 

Statement 3 and 4 are too extreme and also IPCC report do not highlight any such risk. Option 4 is wrong because beyond 3 degree rise in global temperature, the cereal crop yield will decrease by 20% in low-altitudes. So saying “cultivation will not be possible” will be wrong as cultivation decreases but doesnt disappear. 

 

Question : Consider the following statements:

1. Animal Welfare Board of India is established under the Environment (Protection) Act, 1986.
2. National Tiger Conservation Authority is a statutory body.
3. National Ganga River Basin Authority is chaired by the Prime Minister.

Which of the statements given above is/ are correct?

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

Answer : B

Explanation : Animal Welfare Board was established in 1962 under Section 4 of the Prevention of Cruelty to Animals Act, 1960  So, Statement 1 is wrong and consequently Option A and D (India Yearbook 2014 Pg:29A)

 The National Tiger Conservation Authority (established in 2005) is a statutory body under the Ministry of Environment, Forests and Climate Change.
It was provided statutory status by the Wild Life (Protection) Amendment Act, 2006 which had amended Wild Life (Protection) Act, 1972. Statement 2 is correct.

NGRBA chaired by PM is correct as per India Yearbook 2014 Pg:682. So Statement 3 is correct

So Option B is correct viz. statements 2 and 3

 

 

Question : With reference to Bombay Natural History Society (BNHS), consider the following statements
 
1. It is an autonomous organization under the Ministry of Environment and Forests.
2. It strives to conserve nature through action-based research, education and public awareness.
3. It organizes and conducts nature trails and camps for the general public.

Which of the statements given above is/are correct?

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

Answer : C

Explanation : Statement 1 is incorrect - BNHS is designated as a Scientific and Industrial Research Organization (SIRO) by Department of Science & Technology.(refer to https://www.bnhs.org/who-we-are)

Statement 2 is correct - As per their website (refer to https://www.bnhs.org/who-we-are)
"Our primary goal is to spread awareness about nature through science-based research, conservation advocacy, education, scientific publications, nature tours and other programme"

Statement 3 is correct (refer - https://www.bnhs.org/nature-trails)

Therefore option C is correct. 

 

Question : Consider the following statements regarding ‘Earth Hour’

1. It is an initiative of UNEP and UNESCO.
2. It is a movement in which the participants switch off the lights for one hour on a certain day every year.
3. It is a movement to raise the awareness about the climate change and the need to save the planet.


Which of the statements given above is / are correct?

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

Answer : C

Explanation : Earth Hour is a worldwide movement organized by the World Wide Fund for Nature (WWF) and so Statement 1 is incorrect .
It is held annually by encouraging individuals, communities, and businesses to turn off non-essential electric lights for one hour on a specific day towards the end of March, as a symbol of commitment to the planet. so Statement 2 is correct 

 

 

Question : Every year, a month long ecologically important campaign/festival is held during which certain communities/ tribes plant saplings of fruit-bearing trees. Which of the following are such communities/tribes?

A. Bhutia and Lepcha
B. Gond and Korku
C. lrula and Toda
D. Sahariya and Agariya

Answer : B

Explanation : The Gond and Korku tribes of Madhya Pradesh's Betul and Harda districts celebrate Hari Jiroti every monsoon . In this month-long festival of greenery, the tribals plant saplings of fruit-bearing trees.
 

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