SSC Ecology And Environment Sample Paper

done NCERT Sample Paper-2 Total Questions - 100    [Download]

• question_answer1)
  In a comparative study of grassland ecosystem and pond ecosystem
  A)
   Biotic components are almost similar
  done clear
  B)
   Abiotic components are almost similar
  done clear
  C)
   Primary and secondary consumers are similar
  done clear
  D)
   Both biotic 'and abiotic components are different
  done clear
  View Answer play_arrow

• question_answer2)
  Ecotone is characterized by
  A)
   Forest ecosystem
  done clear
  B)
   Transition zone between two vegetation
  done clear
  C)
   Terrestrial ecosystem
  done clear
  D)
   Zone of transition between water & land
  done clear
  View Answer play_arrow

• question_answer3)
  The relationship in an ecosystem can be depicted in the pyramid of
  A)
   Energy 
  done clear
  B)
   biomass
  done clear
  C)
   Numbers          
  done clear
  D)
   all of these
  done clear
  View Answer play_arrow

• question_answer4)
  Decomposers are
  A)
   Autotrophs       
  done clear
  B)
   heterotrophs
  done clear
  C)
   autoheterotrophs
  done clear
  D)
   organotrophs
  done clear
  View Answer play_arrow

• question_answer5)
  The biotic part of ecosystem includes
  A)
   Producers         
  done clear
  B)
   consumers
  done clear
  C)
   Decomposers
  done clear
  D)
   all of these
  done clear
  View Answer play_arrow

• question_answer6)
  Two different species cannot live for long duration in the same niche or habitats. This statement is called
  A)
   Gause's law
  done clear
  B)
   Alien's law
  done clear
  C)
   Weiseman's law
  done clear
  D)
   Competitive Exclusion Principle
  done clear
  View Answer play_arrow

• question_answer7)
  The relationship between hermit crab and sea anemone is
  A)
   Symbiosis        
  done clear
  B)
   mutualism
  done clear
  C)
   Parasitism        
  done clear
  D)
   commensalism
  done clear
  View Answer play_arrow

• question_answer8)
  Biodiversity Act of India was passed by the Parliament in the year
  A)
   1992   
  done clear
  B)
   1996
  done clear
  C)
   2000               
  done clear
  D)
   2002
  done clear
  View Answer play_arrow

• question_answer9)
  The organisms inhabiting a common environment belong to the same
  A)
   Species
  done clear
  B)
   genus
  done clear
  C)
   Population       
  done clear
  D)
   community
  done clear
  View Answer play_arrow

• question_answer10)
  Which of the following controls the population from going beyond its limits?
  A)
   Carrying capacity
  done clear
  B)
   Environmental resistance
  done clear
  C)
   Shortage of food supply
  done clear
  D)
   Family planning programme
  done clear
  View Answer play_arrow

• question_answer11)
  The theory population would exceed the food resources was given by
  A)
   Oparin theory
  done clear
  B)
          Darwin theory
  done clear
  C)
   Malthus theory
  done clear
  D)
          Lamarck theory
  done clear
  View Answer play_arrow

• question_answer12)
  Species is a
  A)
   Group immediately below a phylum
  done clear
  B)
   Closely related interbreeding population
  done clear
  C)
   Taxonomic division of similar genera
  done clear
  D)
   Closely related non-breeding population
  done clear
  View Answer play_arrow

• question_answer13)
  The concept that 'population tends to-increase geometrically, while food production increases arithmetically' was put forward by
  A)
   Stuart Mill        
  done clear
  B)
   Adam Smith
  done clear
  C)
   Charles Darwin
  done clear
  D)
   Thomas R. Malthus
  done clear
  View Answer play_arrow

• question_answer14)

  Consider the following statements regarding the

  Prototype Carbon Fund:

  1. The Prototype Carbon Fund was created by the Executive Directors of the World Bank.

  2. The PCF is intended to invest in projects that will produce high quality greenhouse gas emission reductions that could be registered with the United Nations Framework Convention on Climate Change (UNFCCC) for the purposes of the Kyoto Protocol.

  3. The PCF will pilot production of emission reductions within the framework of Joint Implementation and the Clean Development Mechanism (CDM).

  4. Contributors, or "Participants" in the PCF, will receive a pro rata share of the emission reductions, verified and certified in accordance with agreements reached with the respective countries "hosting" the projects. Select the correct answer using the code given below:

  Codes:
  A)
   1 and 3
  done clear
  B)
   2 and 4
  done clear
  C)
   2, 3 and 4        
  done clear
  D)
   1, 2, 3 and 4
  done clear
  View Answer play_arrow

• question_answer15)
  Bagassosis is
  A)
   Hyper sensitivity pneumonia due to exposure to fibrous cellulose part of crushed sugar cane
  done clear
  B)
   An asthma like condition produced due to exposure to flax or cotton fibres
  done clear
  C)
   Hyper sensitivity pneumonitis due to exposure to damp hay or grain
  done clear
  D)
   Hyper sensitivity pneumonitis due to exposure to paprika
  done clear
  View Answer play_arrow

• question_answer16)
  According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health?
  A)
   2.5 or less        
  done clear
  B)
   1.5 or less
  done clear
  C)
   1.0 or less
  done clear
  D)
   5.2-2.5
  done clear
  View Answer play_arrow

• question_answer17)
  If the river water is polluted with domestic sewage and garbage it leads to the depletion of
  A)
   \[C{{O}_{2}}\]
  done clear
  B)
   \[CO\]
  done clear
  C)
   \[{{O}_{2}}\]              
  done clear
  D)
   All the above
  done clear
  View Answer play_arrow

• question_answer18)
  The most threatening factor for the survival of plant biodiversity is
  A)
   Destruction of natural habitat
  done clear
  B)
   Biosphere reserves and increasing pollution
  done clear
  C)
   Vulnerable ecosystems like mangroves and wetlands
  done clear
  D)
   Inaccessibility of habitats
  done clear
  View Answer play_arrow

• question_answer19)

  Ecosystem provides various services. Which of the following is/are supporting services?

  1. Nutrient recycling

  2. Medicinal resources

  3. Carbon sequestration

  Select the correct answer using the codes given below.

  A)
   1 only
  done clear
  B)
   1 and 2 only
  done clear
  C)
   2 and 3 only
  done clear
  D)
   1 and 3 only
  done clear
  View Answer play_arrow

• question_answer20)

  Consider the following statements:

  1. IUCN classify protected areas according to their management objectives.

  2. National parks of India are in the category IUCN 1.

  Which of the statements given above is/are correct?

  A)
   1 only 
  done clear
  B)
   2 only
  done clear
  C)
   Both 1 and 2    
  done clear
  D)
   neither 1 nor 2
  done clear
  View Answer play_arrow

• question_answer21)
  Biggest national park of India is
  A)
   Carbett National, U.P.
  done clear
  B)
   Bandhavgarth National, M.P.
  done clear
  C)
   Periyar National, Kerala
  done clear
  D)
   Sundarbans, W.B.
  done clear
  View Answer play_arrow

• question_answer22)
  Which of the following pairs of an animal and a plant represents endangered organisms in India?
  A)
   Banyan and Black buck
  done clear
  B)
   Bentinckia nicobarica and Red Panda
  done clear
  C)
   Tamarind and Rhesus monkey
  done clear
  D)
   Cinchona and Leopard
  done clear
  View Answer play_arrow

• question_answer23)

  Consider the following statements concerning food chains

  Removal of 80% tigers from an area resulted in greatly increased growth of vegetation

  Removal of most of the carnivores resulted in an increased population of deer

  The length of food chains is generally limited to 3-4 trophic levels due to energy loss

  The length of food chains may vary from 2 to 8 trophic levels. Which two of the above statements are correct?

  A)
   B and C          
  done clear
  B)
   C and D
  done clear
  C)
   A and D          
  done clear
  D)
   A and B
  done clear
  View Answer play_arrow

• question_answer24)

  Water in a wetland can be:

  1. Fresh

  2. Brackish

  3. Static

  Select the correct answer using the codes given below.

  A)
   1 and 2 only    
  done clear
  B)
   1 and 3 only
  done clear
  C)
   2 and 3 only    
  done clear
  D)
   1, 2 and 3
  done clear
  View Answer play_arrow

• question_answer25)
  If BOD of a river is high, it means that the river
  A)
   Is not polluted
  done clear
  B)
   Is very polluted
  done clear
  C)
   Does not have green plants
  done clear
  D)
   Get least amount of light
  done clear
  View Answer play_arrow

• question_answer26)
  A plant being eaten by herbivore which, in turn, is eaten by carnivore. It makes
  A)
   Biomass          
  done clear
  B)
   food web
  done clear
  C)
   Food chain       
  done clear
  D)
   ecological niche
  done clear
  View Answer play_arrow

• question_answer27)
  Food chains operate in
  A)
   Sea                 
  done clear
  B)
   forests
  done clear
  C)
   Deserts
  done clear
  D)
   all of these
  done clear
  View Answer play_arrow

• question_answer28)
  The zone of atmosphere that lies near the ground is
  A)
   Troposphere     
  done clear
  B)
   stratosphere
  done clear
  C)
   homosphere     
  done clear
  D)
   ionosphere
  done clear
  View Answer play_arrow

• question_answer29)
  An ecosystem has two components such as
  A)
   Frogs and men
  done clear
  B)
          biotic and abiotic
  done clear
  C)
   Plants and animals
  done clear
  D)
   weeds and trees
  done clear
  View Answer play_arrow

• question_answer30)
  In an ecosystem, which of the following shows one- way passage?
  A)
   Carbon            
  done clear
  B)
   nitrogen
  done clear
  C)
   Minerals           
  done clear
  D)
   free energy
  done clear
  View Answer play_arrow

• question_answer31)
  The free floating organisms, of an open sea and shore, are collectively called
  A)
   Planktons         
  done clear
  B)
   nektons
  done clear
  C)
   benthoic          
  done clear
  D)
   sea anemore
  done clear
  View Answer play_arrow

• question_answer32)
  Pond is an example of which of the following ecosystems?
  A)
   Artificial           
  done clear
  B)
   forest
  done clear
  C)
   Natural
  done clear
  D)
   grassland
  done clear
  View Answer play_arrow

• question_answer33)
  The first fish, which eats the planktonic form, is
  A)
   Decomposer
  done clear
  B)
   primary consumer
  done clear
  C)
   Secondary consumer
  done clear
  D)
   tertiary consumer
  done clear
  View Answer play_arrow

• question_answer34)
  The great barrier reefs along the east coast of Australia can be categorized as
  A)
   Population       
  done clear
  B)
   community
  done clear
  C)
   Ecosystem       
  done clear
  D)
   biome
  done clear
  View Answer play_arrow

• question_answer35)
  The most threatening factor for the survival of plant biodiversity is
  A)
   Destruction of natural habitat
  done clear
  B)
   Biosphere reserves and increasing pollution
  done clear
  C)
   Vulnerable ecosystems like man grooves and wet lands
  done clear
  D)
   Inaccesibility of habitats.
  done clear
  View Answer play_arrow

• question_answer36)
  An ecosystem, which can be easily damaged but can recover after some time if the damaging effect stops, will be having
  A)
   Low stability and low resilience
  done clear
  B)
   High stability and low resilience
  done clear
  C)
   Low stability and high resilience
  done clear
  D)
   High stability and high resilience
  done clear
  View Answer play_arrow

• question_answer37)
  Water saturation capacity is maximum in
  A)
   Tropical forests
  done clear
  B)
   deciduous forests
  done clear
  C)
   Scrub forests    
  done clear
  D)
   temperate forest
  done clear
  View Answer play_arrow

• question_answer38)
  In a totally burnt forest which species will grow first?
  A)
   Mosses
  done clear
  B)
   herbaceous plants
  done clear
  C)
   Bryophytes and fungi
  done clear
  D)
   Pteridophytes
  done clear
  View Answer play_arrow

• question_answer39)

  Persistent organic pollutants (PoPs) are harmful for health and environment because:

  1. They are resistant to environmental degradation.

  2. They can undergo bioaccumulation.

  3. They can cause global warming.

  Select the correct answer using the codes given below.

  A)
   1 and 2 only    
  done clear
  B)
   1 and 3 only
  done clear
  C)
   2 and 3 only
  done clear
  D)
   1, 2 and 3
  done clear
  View Answer play_arrow

• question_answer40)
  Which of the following represent endangered flora?
  A)
   Drosera Indica
  done clear
  B)
          Panthera Leo
  done clear
  C)
   Acinonyx         
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer41)
  If the Bengal Tiger becomes extinct:
  A)
   Hyenas and wolves will become scarce
  done clear
  B)
   The wild areas will be safe for man and domestic animals.
  done clear
  C)
   Its gene pool will be lost forever.
  done clear
  D)
   The populations of beautiful animals like deers will get stabilized.
  done clear
  View Answer play_arrow

• question_answer42)
  A Tropical rain forests are disappearing fast from developing countries such as India. R. No value is attached to these forests because these are poor in biodiversity.
  A)
   A is correct and R is its explanation
  done clear
  B)
   A is correct but R is not its explanation
  done clear
  C)
   A is correct but R is wrong
  done clear
  D)
   A is wrong but R is correct
  done clear
  View Answer play_arrow

• question_answer43)
  Social forestry plays an important role as it uses
  A)
   Multipurpose aims
  done clear
  B)
   timbers
  done clear
  C)
   Floriculture       
  done clear
  D)
   medicines
  done clear
  View Answer play_arrow

• question_answer44)
  Which of the following is responsible for maximum GHGs emission?
  A)
   Industrial processes        
  done clear
  B)
   Agriculture
  done clear
  C)
   Thermal power stations   
  done clear
  D)
   Transportation fuels
  done clear
  View Answer play_arrow

• question_answer45)
  Carbon monoxide is a pollutant because it
  A)
   Inactivates nerves
  done clear
  B)
   Inhibits glycolysis
  done clear
  C)
   Combines with \[{{O}_{2}}\]
  done clear
  D)
   Combines with haemoglobin
  done clear
  View Answer play_arrow

• question_answer46)
  Increase in concentration of toxins in higher trophic levels is called
  A)
   biomagnification
  done clear
  B)
   bioremediation
  done clear
  C)
   biopiracy         
  done clear
  D)
   pollution
  done clear
  View Answer play_arrow

• question_answer47)
  This pollutant causes burning sensation of throat and eyes and vomiting sensation.
  A)
   Hydrogen sulphide
  done clear
  B)
   sulphur
  done clear
  C)
   Hydrogen cyanide
  done clear
  D)
   arsenic substances
  done clear
  View Answer play_arrow

• question_answer48)
  Effect of pollution is observed first on
  A)
   micro-organisms
  done clear
  B)
   food crop
  done clear
  C)
   Green vegetation
  done clear
  D)
   herbivores
  done clear
  View Answer play_arrow

• question_answer49)
  Which one of the following is an environment related disorder with the correct main cause?
  A)
   Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.
  done clear
  B)
   Blue baby disease (methemoglobinemia) due to heavy use of nitrogenous fertilizers in the area.
  done clear
  C)
   Non-Hodgkin's Lymphoma found mainly in workers involved in manufacture of neem based pesticides.
  done clear
  D)
   Skin cancer mainly in people exposed to benzene and methane
  done clear
  View Answer play_arrow

• question_answer50)
  Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by
  A)
   Storing them in underground storage tanks
  done clear
  B)
   Using them for producing biogas
  done clear
  C)
   Vermin culture
  done clear
  D)
   Using them directly as biofertilisers
  done clear
  View Answer play_arrow

• question_answer51)
  Kyoto protocol is
  A)
   To mitigate the climatic change
  done clear
  B)
   To check depletion of ozone layer
  done clear
  C)
   To check soil erosion
  done clear
  D)
   To preserve water resources
  done clear
  View Answer play_arrow

• question_answer52)
  Identify the correctly matched pair.
  A)
   Montreal Protocol- Global warming
  done clear
  B)
   Kyoto Protocol - Climatic change
  done clear
  C)
   Ramsar Convention - Ground water pollution
  done clear
  D)
   Basel Convention - Biodiversity Conservation
  done clear
  View Answer play_arrow

• question_answer53)

  With reference to ground level ozone (GLO), consider the following statements:

  1. GLO reach unhealthy levels on cold days.

  2. They can be transported long distances by wind. Which of the statements given above is/are correct?

  A)
   1 only 
  done clear
  B)
   2 only
  done clear
  C)
   Both 1 and 2    
  done clear
  D)
   neither 1 nor 2
  done clear
  View Answer play_arrow

• question_answer54)
  The reason for global warming is
  A)
   Long wavelength radiation are absorbed by the atmosphere
  done clear
  B)
   Short wavelength radiation are-absorbed by the atmosphere
  done clear
  C)
   Atmosphere traps radiations to increase the temperature
  done clear
  D)
   UV and infrared radiations
  done clear
  View Answer play_arrow

• question_answer55)
  In automobile exhaust which component coming out can cause greenhouse effect?
  A)
   \[C{{O}_{2}}\]
  done clear
  B)
   Hydrocarbons
  done clear
  C)
   \[S{{O}_{2}}\]            
  done clear
  D)
   \[N{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer56)
  Incorrect match for wild life national parks/sanctuaries of India is
  A)
   Kaziranga National Park-Assam
  done clear
  B)
   Dachigarn Sanctuary-Jammu and Kashmir
  done clear
  C)
   Periyar National Park-Kerala
  done clear
  D)
   Guindy National Park-Orissa
  done clear
  View Answer play_arrow

• question_answer57)
  DDT is
  A)
   Not a pollutant
  done clear
  B)
   An antibiotic
  done clear
  C)
   A biodegradable pollutant
  done clear
  D)
   A non-degradable pollutant
  done clear
  View Answer play_arrow

• question_answer58)
  The Siberian crane from Russia is a regular visitor to the bird sanctuary in one of the following place in India
  A)
   Lallbagh, Bangalore
  done clear
  B)
   Vendanthgol sanctuary, Tamil Nadu
  done clear
  C)
   Ranganathittis sanctuary, Karnataka
  done clear
  D)
   Bharatpur sanctuary, Rajasthan
  done clear
  View Answer play_arrow

• question_answer59)
  Major cause of air pollution in big cities is
  A)
   Domestic exhaust          
  done clear
  B)
   Automobile exhaust
  done clear
  C)
   Thermal power plants    
  done clear
  D)
   Burning of cooking gas
  done clear
  View Answer play_arrow

• question_answer60)
  Corbett National park is in
  A)
   Uttarakhand and is famous for tiger
  done clear
  B)
   Rajasthan and is home for black buck
  done clear
  C)
   Punjab and is home for antelopes
  done clear
  D)
   Himachal Pradesh and is famous for birds
  done clear
  View Answer play_arrow

• question_answer61)
  The famous Taj Mahal is threatened due to the effect of
  A)
   Chlorine           
  done clear
  B)
   oxygen
  done clear
  C)
   Hydrogen         
  done clear
  D)
   sulphur dioxide
  done clear
  View Answer play_arrow

• question_answer62)
  The first white tiger safari in the world is in
  A)
   Nagarjuna Sagar-AP.
  done clear
  B)
   Kalkad Mundanthurai-Tamil Nadu
  done clear
  C)
   Periyar-Kerala
  done clear
  D)
   Nandan Kanan Zoological Park-Orissa
  done clear
  View Answer play_arrow

• question_answer63)
  Chlorofluorocarbon pollution sources include
  A)
   Jet air crafts     
  done clear
  B)
   refrigerators
  done clear
  C)
   Fire extinguishers
  done clear
  D)
   all of these
  done clear
  View Answer play_arrow

• question_answer64)
  'Project Tiger' in India was started in
  A)
   1970   
  done clear
  B)
   1973
  done clear
  C)
   1981               
  done clear
  D)
   1985
  done clear
  View Answer play_arrow

• question_answer65)
  The high amount of E. coli in water, is the indicator of
  A)
   Hardness of water
  done clear
  B)
   Industrial pollution
  done clear
  C)
   Sewage pollution
  done clear
  D)
   Presence of chlorine in water
  done clear
  View Answer play_arrow

• question_answer66)
  One of the following Indian species whose number has been left to just 195 due to excessive poaching and capturing in forests of South India and is in endangered list is
  A)
   Largest lemur, Idri idri
  done clear
  B)
   Lion tailed macaque, Macaca silenus
  done clear
  C)
   Asiatic wild ass, Asinus hemionus
  done clear
  D)
   Great Indian bustard, Ardeotis
  done clear
  View Answer play_arrow

• question_answer67)
  BOD stands for
  A)
   Biotic oxide demand
  done clear
  B)
   Base of degradation
  done clear
  C)
   Biotic oxygen deduction
  done clear
  D)
   Biological oxygen demand
  done clear
  View Answer play_arrow

• question_answer68)
  'Tendua' is zoologically named as
  A)
   Panthera tigris  
  done clear
  B)
   Panthera leo
  done clear
  C)
   Panthera uncia
  done clear
  D)
   Panthera pardus
  done clear
  View Answer play_arrow

• question_answer69)
  Based on toxicological characteristics, there are important forms of mercury such as
  A)
   Elemental        
  done clear
  B)
   inorganic
  done clear
  C)
   Organic
  done clear
  D)
   all above.
  done clear
  View Answer play_arrow

• question_answer70)
  Crop rotation is used by farmers to increase
  A)
   Soil fertility
  done clear
  B)
   Community area
  done clear
  C)
   Organic content of soil
  done clear
  D)
   Nitrogenous content in the soil
  done clear
  View Answer play_arrow

• question_answer71)

  Which of the measures below are environment friendly?

  1. Increasing the diesel subsidy in.

  2. Ban on polybags manufacturing & using.

  3. Usage of public transport.

  4. Incineration of waste materials collected.

  Choose the correct options:

  A)
   1, 2, 3 
  done clear
  B)
   2, 3
  done clear
  C)
   1, 2, 4 
  done clear
  D)
   2, 4
  done clear
  View Answer play_arrow

• question_answer72)
  Which of the following is a largest source of formaldehyde vapour pollution in a room?
  A)
   Utensil 
  done clear
  B)
   Furniture
  done clear
  C)
   Cooking range
  done clear
  D)
          Books
  done clear
  View Answer play_arrow

• question_answer73)
  In 'Wet System' of removing gaseous-pollutants
  A)
   Alkali fluid is used
  done clear
  B)
   acidic fluid is used
  done clear
  C)
   Neutral fluid is used
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer74)
  Which of the following is an example of biotic resource of energy?
  A)
   Salts               
  done clear
  B)
   Rocks
  done clear
  C)
   Water  
  done clear
  D)
   Milk
  done clear
  View Answer play_arrow

• question_answer75)
  PAN (Peroxyacetyl Nitrate) is an important constituent of photochemical smog. It is a
  A)
   Primary pollutant
  done clear
  B)
   secondary pollutant
  done clear
  C)
   Natural pollutant
  done clear
  D)
   corrollary pollutant
  done clear
  View Answer play_arrow

• question_answer76)

  With the increase in emissions (industrial, vehicular etc) at current rate which of the below situations are possible:

  1. The average monsoon would increase over a period of time.

  2. The average temperature would increase over a period of time.

  3. The agricultural production would fall in short term.

  4. Floods and droughts both would increase.

  Which of the above statements are correct?

  A)
   1, 2, 3 
  done clear
  B)
   All of the above
  done clear
  C)
   2, 3, 4 
  done clear
  D)
   1. 2, 4
  done clear
  View Answer play_arrow

• question_answer77)
  The presence of ozone in the atmosphere of earth
  A)
   Hinders higher rate of photosynthesis
  done clear
  B)
   Has been responsible for increasing the average global temperature in recent past
  done clear
  C)
   Helps in checking the ultra violet rays to earth
  done clear
  D)
   is advantageous since it supplies oxygen for people travelling in jets.
  done clear
  View Answer play_arrow

• question_answer78)
  Which of the following components causes water pollution?
  A)
   Smoke 
  done clear
  B)
   ammonia
  done clear
  C)
   phytoplariktons
  done clear
  D)
   industrial wastes
  done clear
  View Answer play_arrow

• question_answer79)
  More than half of the earth's flora and fauna is found in
  A)
   Tropical rain forests
  done clear
  B)
   Mountain temperate forests
  done clear
  C)
   Deciduous forests
  done clear
  D)
   Alpine forests
  done clear
  View Answer play_arrow

• question_answer80)
  'Ozone hole' refers to
  A)
   Increased concentration of ozone
  done clear
  B)
   Hole in the ozone layers in stratosphere
  done clear
  C)
   Reduction in ozone thickness in troposphere
  done clear
  D)
   Reduction in the thickness of ozone layer in stratosphere
  done clear
  View Answer play_arrow

• question_answer81)
  The protection of animal species is important because they are
  A)
   Lovely creatures
  done clear
  B)
   Useful to humans as part of ecosystem
  done clear
  C)
   To be studied by zoologists
  done clear
  D)
   Man cannot recreate a lost species.
  done clear
  View Answer play_arrow

• question_answer82)
  Damage of ozone \[({{O}_{3}})\] layer is due to harmful effects of
  A)
   Carbon dioxide
  done clear
  B)
          Sulphur dioxide
  done clear
  C)
   Organic compounds      
  done clear
  D)
   chlorofluoro carbons
  done clear
  View Answer play_arrow

• question_answer83)
  The creating force of an any ecosystem is
  A)
   Organic fuels, carbohydrates
  done clear
  B)
   Biomass
  done clear
  C)
   Solar energy
  done clear
  D)
   Producers
  done clear
  View Answer play_arrow

• question_answer84)
  Green-house effect refers to
  A)
   Cooling of earth
  done clear
  B)
   Trapping of UV rays
  done clear
  C)
   Warming of earth
  done clear
  D)
          Production of cereals
  done clear
  View Answer play_arrow

• question_answer85)
  DDT residues are rapidly passed through food chain causing bio magnification because DDT is
  A)
   Non-toxic to aquatic animals
  done clear
  B)
   Water soluble
  done clear
  C)
   lipo soluble
  done clear
  D)
   Moderately toxic
  done clear
  View Answer play_arrow

• question_answer86)
  Deforestation is a major cause of
  A)
   Soil degradation
  done clear
  B)
   Environmental pollution
  done clear
  C)
   Destruction of habitat
  done clear
  D)
   all of these
  done clear
  View Answer play_arrow

• question_answer87)
  A Pyramid of energy is upright, it represents
  A)
   There is increase in energy of ecosystem
  done clear
  B)
   There is decrease in energy due to concentration in successive levels
  done clear
  C)
   There is decrease in energy due to loss in form of heat in each trophic level
  done clear
  D)
   There in increase in energy due to gain of heat in each trophic level.
  done clear
  View Answer play_arrow

• question_answer88)
  Which of the following part has a high density of organisms?
  A)
   Grasslands       
  done clear
  B)
   savannahs
  done clear
  C)
   Deciduous forests
  done clear
  D)
   tropical rain forests
  done clear
  View Answer play_arrow

• question_answer89)
  Ability of the community to come back quickly to its original form is
  A)
   Resistance        
  done clear
  B)
   resilience
  done clear
  C)
   Disturbance      
  done clear
  D)
   heterogeneity
  done clear
  View Answer play_arrow

• question_answer90)
  In autogenic succession
  A)
   Early and continued dominance of autotrophic organism takes place like green plants
  done clear
  B)
   Replacement of existing communities cause largely by any other external condition
  done clear
  C)
   Early dominance of heterotrophs takes place such as bacteria, fungi and other animals
  done clear
  D)
   Community itself modifies its own environment thus causing its own replacement by new communities
  done clear
  View Answer play_arrow

• question_answer91)
  Treeless terrestrial biome of cold climates is
  A)
   Taiga  
  done clear
  B)
   savana
  done clear
  C)
   Tundra
  done clear
  D)
   plankton
  done clear
  View Answer play_arrow

• question_answer92)
  How does the ephemeral Tribulus tide over the dry conditions?
  A)
   Its tuberous stem
  done clear
  B)
   Its aerial stem
  done clear
  C)
   Lying in the forming seeds
  done clear
  D)
   Storing water in different parts of its body
  done clear
  View Answer play_arrow

• question_answer93)
  Field capacity is
  A)
   Same as permanent wilting point
  done clear
  B)
   Higher for sandy soils than clay soils
  done clear
  C)
   Amount of water left in soil after drainage
  done clear
  D)
   Amount of water in soil available to plants
  done clear
  View Answer play_arrow

• question_answer94)
  In a forest ecosystem, fungi comes under
  A)
   Secondary consumer
  done clear
  B)
   tertiary consumer
  done clear
  C)
   Decomposers    
  done clear
  D)
   primary producers.
  done clear
  View Answer play_arrow

• question_answer95)
  Humus is
  A)
   Chemical fertilizer
  done clear
  B)
   Living organic and inorganic things
  done clear
  C)
   Dead and decayed organic matter
  done clear
  D)
   Accumulation of radioactive materials
  done clear
  View Answer play_arrow

• question_answer96)
  A new species can be developed by
  A)
   Mutation and isolation
  done clear
  B)
   Isolation and competition
  done clear
  C)
   Mutation and competition
  done clear
  D)
   Variation and competition
  done clear
  View Answer play_arrow

• question_answer97)
  Diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence for
  A)
   Origin of species by natural selection
  done clear
  B)
   Intraspecific variations
  done clear
  C)
   Intraspecific competition
  done clear
  D)
   Interspecific competition
  done clear
  View Answer play_arrow

• question_answer98)
  Heavy rainfall during summer produces
  A)
   Desert  
  done clear
  B)
   grasslands
  done clear
  C)
   Shrub forests    
  done clear
  D)
   deciduous forests
  done clear
  View Answer play_arrow

• question_answer99)
  Large gap between natality and mortality will result in
  A)
   Less old persons in relation to children
  done clear
  B)
   More old persons
  done clear
  C)
   Low dependency ratio
  done clear
  D)
   Prosperous country
  done clear
  View Answer play_arrow

• question_answer100)
  Alluvial soils are mostly found in
  A)
   Eastern India    
  done clear
  B)
   Northern India
  done clear
  C)
   Southern India
  done clear
  D)
   Western India
  done clear
  View Answer play_arrow