200 Environment Related Multiple Choice Questions (MCQ)

The study of environment or rather environmental studies is a multi-disciplinary subject which needs knowledge interest from physical sciences (physics, chemistry, mathematics), biological sciences (botany, zoology, microbiology, biochemistry), social sciences, economics, sociology, education, geography) etc. Obviously, environmental studies has a broad base, which requires integrated approach for dealing with the various aspects.

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This set of questions will help the students to test their understanding of the Environment and Ecology which in turn will sustain their interest in environmental science. There may be more than one correct answers.

1. Environment means

(a) a beautiful landscape
(b) industrial production
(c) sum total of all conditions that affect the life and development of all organisms on earth

2. Environmental studies involve studies of

(a) evolution of life
(b) all aspects of human environment
(c) nitrogen cycle

3. The killer in Bhopal Disaster was

(a) methyl isocyanate
(b) carbaryl
(c) accidental fire in the factory

4. The quality of environment has steadily suffered due to

(a) man-made activities
(b) air, water, soil and food pollution
(c) public awareness

5. Environmental degradation has been due to

(a) poverty of the developing countries
(b) over-consumption of earth’s resources by the developed countries
(c) poor quality of life

6. The earth was born

(a) 6.0 billion years ago
(b) 4.5 billion years ago
(c) 10,000 years ago

7. The first living form (blue-green algae) appeared on earth

(a) 3.5 billion years ago
(b) 6.0 billion years ago
(c) 5.0 billion years ago

8. Soil has an important role as it

(a) gives us space for building houses
(b) produces food for us and animals
(c) provides highways for traffic

9. Soil, suitable for agriculture, consists of

(a) micro-organisms only
(b) rock powder and water
(c) 5 per cent organic and 95 per cent inorganic matter

10. Biosphere means

(a) the earth’s crust only
(b) the earth’s crust, air, water and all living species
(c) micro-organisms only

11. The earth swings back and forth between hot and cold periods

(a) with the rise and fall of carbon dioxide concentration
(b) with change in ocean currents
(c) with increased deforestation

12. We get our supply and reserves of freshwater

(a) from hydrological cycle
(b) from carbon cycle
(c) from snowfall

13. The source of atmospheric oxygen is

(a) the nitrogen cycle
(b) photosynthesis by green plants
(c) exchange of oxygen among the environmental segments

14. The major reservoir of carbon (carbon dioxide) is

(a) the ocean beds
(b) the atmosphere
(c) plants and animals

15. Forests are important

(a) for life-support systems
(b) renewable resources
(c) for animals only

16. India has been losing

(a) very little forests each year
(b) 1.3 million hectares of forests each year
(c) 100 million hectares of forests each year

17. The main causes for deforestation are

(a) tribal people
(b) increasing human and livestock population
(c) timber business

18. The aim of social forestry is to meet the demand for

(a) firewood and fodder among rural people
(b) furniture for urban people
(c) removing pressure on natural forests

19. Biodiversity involves

(a) forests only
(b) the living natural resources (plants, animals, micro-organisms)
(c) human beings

20. Extinction of species is

(a) part of natural extinction
(b) natural extinction accelerated by man-made extinction
(c) due to natural disasters

21. The P-Triangle is composed of

(a) biodiversity
(b) population, poverty and pollution
(c) poverty, flood and drought

22. Indian population doubled

(a) between 1901 and 1930
(b) between 1950 and 1981
(c) between 1941 and 1961

23. The countries with 1-billion+population are

(a) China and India
(b) USA and Canada
(c) France and Germany

24. Population explosion occurs when

(a) population increases at a slow rate
(b) population size exceeds the carrying capacity
(c) population matches the natural resources

25. Population stabilisation is essential for

(a) agriculture
(b) economic growth
(c) sustainable development

26. Human Development Index (HDI) is based on the parameters

(a) life span, literacy and standard of living
(b) growth of population and industry
(c) income and education of an adult

27. In India, 50 per cent population

(a) have good standard of living
(b) live below the poverty line
(c) have no access to safe drinking water

28. India loses topsoil

(a) 5 billion tonnes a year
(b) 1 billion tonnes a year
(c) 25 billion tonnes a year

29. Soil erosion or loss of topsoil is caused by

(a) agriculture
(b) deforestation
(c) drought and flood

30. Freshwater available for our use is

(a) less than 5 per cent of total water resources
(b) more than 10 per cent of total water resources
(c) less than 1 per cent of total water resources

31. Ocean water, vast water resource (97 per cent), is

(a) good for agriculture
(b) unfit for human consumption
(c) useful for coastal vegetation

32. Compared to sea water and lake water, groundwater contains

(a) same mineral salts, nitrate, and bicarbonate
(b) less mineral salts, nitrate and bicarbonate
(c) more mineral salts, nitrate and bicarbonate

33. The symptoms of polluted water are

(a) no change in physical appearance
(b) no external matter on the surface
(c) foul smell, bad taste, oil and grease and dead fish floating on the surface

34. Organic pollutants in water include

(a) soap and detergents
(b) mine drainage (acid)
(c) domestic sewage, pesticides, paper mill and tannery wastes

35. Eutrophication results from

(a) Agricultural run-off and domestic sewage input
(b) industrial effluent
(c) vehicular exhausts

36. Pesticide residues in crops enter the human bodies through

(a) birds and insects
(b) human food chain
(c) animals only

37. Thermal pollution originates from discharge of waste water from

(a) steel plant
(b) nuclear power plant
(c) thermal power plant

38. Arsenic contamination of groundwater arises from

(a) excessive pumping of groundwater by shallow tube wells for irrigation
(b) seepage of surface water
(c) leaching of arsenopyrite mineral into groundwater

39. Arsenic poisoning from drinking water leads to

(a) loss of hair, brittle nails, gangrene and cancer
(b) diarrhoea, dysentery, etc.
(c) pneumonia, typhoid, etc.

40. The Ganga river is heavily polluted at

(a) Rishikesh and Haridwar
(b) Kanpur, Varanasi and Kolkata
(c) Patna and Allahabad

41. The Ganga pollution is due to dumping of

(a) domestic and industrial sewage
(b) waste from forests
(c) food wastes

42. The Ganga Action Plan is based on

(a) mixing with rainwater
(b) preventing input of domestic and industrial wastes
(c) recycling of water after waste treatment

43. Primary and secondary wastes water treatment are based on

(a) screening of solid matter only
(b) injecting air stream only
(c) screening, sedimentation, aerobic digestion and sedimentation

44. The important water quality parameters are

(a) calcium, magnesium, iron
(b) lead, zinc, mercury
(c) dissolved oxygen, chemical oxygen demand, chloride and arsenic

45. Desalination of sea water means

(a) removal of salts from sea water
(b) dumping of oil into sea water
(c) removal of suspended solids from sea water

46. Water treatment for drinking water supply requires

(a) filtration through sand bed
(b) disinfection by chlorination to kill viruses, bacteria, etc.
(c) sedimentation

47. The major components of the atmosphere are

(a) rare gases
(b) carbon dioxide and argon
(c) nitrogen, oxygen and water vapour

48. The important chemical species in the troposphere are

(a) oxygen, nitric oxide
(b) nitrogen, oxygen, carbon dioxide and water vapour
(c) sulphur dioxide, carbon monoxide

49. The life-saving gas in the atmosphere is

(a) ozone in the stratosphere
(b) water vapour in the troposphere
(c) oxygen (charged) in the mesosphere

50. Global warming is a/an

(a) ocean phenomenon
(b) atmospheric phenomenon
(c) soil phenomenon

51. The Greenhouse Effect is due to

(a) carbon dioxide, water vapour, methane and chlorofluorocarbons
(b) nitrogen oxides
(c) sulphur oxides

52. The Greenhouse Effect may cause global disasters

(a) by favouring forest fires
(b) by increasing the frequencies of cyclones
(c) by affecting agricultural production, sea food production and raising the sea levels due to melting of polar ice caps

53. The protective shield for life on earth is

(a) carbon dioxide
(b) oxygen
(c) ozone

54. Ozone hole is formed by interaction of ozone with

(a) hydrocarbons
(b) chlorofluorocarbons and nitric oxide
(c) carbon dioxide

55. El Nino starts from

(a) Mediterranean coast
(b) Chinese coast
(c) South American coast

56. Automobile exhausts consist of

(a) hydrocarbons, carbon monoxide and nitric oxide
(b) carbon, zinc and lead vapour
(c) sulphur dioxide

57. Autoemissions are controlled by

(a) using oxygen stream in the exhaust pipes of automobiles
(b) using catalytic converters in the engines
(c) replacing petrol/diesel by alcohol

58. Photochemical smog arises from

(a) ozone and methane in the presence of sunlight
(b) carbon monoxide and sulphur dioxide
(c) photochemical reactions of hydrocarbons, ozone, carbon monoxide and nitrogen oxides

59. Primary air pollutants are

(a) oxygen, nitrogen and water vapour
(b) carbon monoxide, nitrogen oxides, sulphur oxides, hydrocarbons and particulates
(c) carbon dioxide, sulphur dioxide and ozone

60. Acid rain consists of

(a) acetic acid and phosphoric acid
(b) acetic and sulphuric acids
(c) hydrogen chloride, nitric and sulphuric acids

61. Acid rain originates from

(a) steel plants
(b) thermal power plants
(c) nuclear reactors

62. Fine particles (0.01–1.0µ size) cause

(a) asthma, bronchitis, tuberculosis
(b) dysentery and diarrhoea
(c) typhoid

63. The source of soot particles in air is

(a) burning of paper
(b) combustion of fuel
(c) evaporation of water from seas

64. Particulate emissions from gas streams can be removed by

(a) lightning discharge in air
(b) electrostatic precipitator
(c) air jet

65. Temperature inversion occurs when

(a) warm air moves above a cold air mass
(b) there is rainfall
(c) drought condition prevails

66. Meteorology of the earth is affected by

(a) natural disasters
(b) human activities
(c) the earth’s rotation

67. Fossil fuel means

(a) hydroelectricity
(b) coal, petroleum and diesel
(c) paper and wood

68. Conventional energy resources are

(a) solar energy
(b) tidal wave energy
(c) fossil fuel, wood, natural gas, hydroelectricity and nuclear energy

69. The most abundant energy resource is

(a) coal
(b) solar energy
(c) diesel

70. Nuclear power is produced from

(a) petroleum combustion
(b) wood combustion
(c) nuclear fission

71. The major renewable natural energy resource is

(a) coal
(b) wood
(c) nuclear fuel

72. Sunlight may be converted into electricity through

(a) photovoltaic cell
(b) galvanic cell
(c) carbon electrodes

73. Solar energy-based equipments are

(a) diesel engine
(b) solar cooker, solar heater, solar pump, etc.
(c) tube well pump

74. The clean pollution-free energy resource is

(a) petroleum and diesel
(b) coal
(c) solar energy

75. Hazardous chemicals cause

(a) no harm to human bodies
(b) little harm to animals
(c) metabolic disorders in human bodies

76. Industries producing toxic wastes are

(a) pharmaceuticals
(b) fertilisers
(c) pesticides

77. Arsenic

(a) does not affect our health
(b) damages liver, kidney, skin, etc.
(c) attacks teeth and nails of humans

78. Cadmium is

(a) beneficial for our health
(b) responsible for “itai itai” disease
(c) without effect on plants

79. Chlorinated organics (pesticides)

(a) eradicate malaria
(b) are carcinogenic
(c) harmful for crops

80. The heavy metal, mercury is

(a) useful, in traces, in medical treatment
(b) a killer in its methyl form and responsible for Minamata diseases
(c) useless for industries

81. Phosphatic fertiliser factories generate byproduct wastes

(a) ammonium sulphate
(b) phosphogypsum
(c) potassium sulphate

82. Thermal power plants produce solid wastes

(a) sulphur dioxide
(b) calcium phosphate
(c) flyash

83. Pesticides are used to

(a) favour growth of insects
(b) reduce production of crops
(c) kill pests and boost agricultural production

84. Pesticide residues

(a) have no effect on environment
(b) cause harm to birds, mammals and humans
(c) are maximum among Indians

85. Integrated Pest Management (IPM) in agriculture means

(a) control of pest population
(b) eradication of pests
(c) co-ordination of methods supplementing the effects of natural control agents

86. Arsenic (III) exerts toxic action by

(a) attacking –OH (hydroxyl group) of an enzyme
(b) attacking –SH (sulphydril group) of an enzyme
(c) reaction with –NH2 (amino group) of protein

87. “Itai itai” disease was caused by

(a) zinc
(b) cadmium
(c) mercury

88. Minamata disease in Japan was due to

(a) alkyl form of mercury
(b) cadmium sulphate
(c) lead chromate

89. Mercury pollution can be prevented by

(a) banning use of mercury in any form in industries
(b) banning all instruments using mercury such as thermometer, barometer, etc.
(c) restricting use of mercurial pesticides and mercury electrodes in industries

90. Noise pollution occurs at

(a) 20 decibels
(b) above 90 decibels
(c) above 150 decibels

91. Solid waste management is best conducted by

(a) incineration
(b) dumping into the seas
(c) sanitary landfill

92. Love Canal dumpsite

(a) did not harm the school and local residents
(b) compelled the authorities to close the school and evacuate the residents in the area
(c) favoured the growth of vegetation in the area

93. The ideal forest cover in relation to total land area is

(a) 55%
(b) 33%
(c) 80%

94. Biosphere reserves have been declared by the Government for conservation of

(a) waterbodies
(b) air
(c) the different ecosystems

95. Environment Protection Act of 1986 is meant for

(a) waste management
(b) protection of human environment including humans, plants, animals and property
(c) forest management

96. Chipko Movement was launched for

(a) stopping deforestation of hill forests in Uttarakhand
(b) land protection
(c) wild-life management

97. Silent Valley Movement succeeded in

(a) waste management in the sea coast
(b) cancelling the state government hydel project and saving the Silent Valley
(c) promoting marine fishery business in Kerala

98. Continental drifting is

(a) due to motion of landmass
(b) due to earthquakes
(c) due to formation of mountains

99. Earthquakes are caused by

(a) violent storms
(b) collision of tectonic plates
(c) volcanic explosion

100. Minamata disease occurred

(a) as a result of oil pollution
(b) as a result of zinc discharge
(c) due to mercury poisoning

101. Bhopal disaster was due to

(a) methyl isocyanate leakage
(b) steam discharge
(c) negligence of factory authorities

102. Chernobyl disaster happened

(a) because of nuclear reactor explosion
(b) due to flyash emission
(c) due to power plant failure

103. Big Bang was a cosmic event

(a) some 1-billion years ago
(b) some 2-billion years ago
(c) some 6.5-billion years ago

104. Biome is

(a) large land community with uniform plant species
(b) marine ecosystem
(c) tropical forest

105. Wetland ecosystem is

(a) combined land and aquatic ecosystem
(b) ponds and lakes
(c) tropical forest

106. Urbanisation means

(a) transformation of villages
(b) construction of cities with infrastructure
(c) migration of landless people

107. Lithosphere means

(a) earth’s interior core
(b) earth’s crust
(c) underground water layer

108. Geologic cycle denotes

(a) recycling of earth’s crust
(b) weathering of soil
(c) eruption of volcanic lava

109. Biogeochemical cycles are

(a) same as hydrological cycle
(b) similar to geological cycle
(c) circulation of chemical elements among biological organism and physical environment

110. Tornadoes are

(a) storms and rains
(b) violent thunderstorms
(c) thunder, lightning and rain

111. Mangroves are

(a) desert plants
(b) high-altitude plants
(c) forests in tidal zones of equatorial and tropical coasts

112. Sustainable ecosystem consists of

(a) land, forest and water ecosystem which can be renewed
(b) tropical forests
(c) coastal lakes and forests

113. Carrying capacity means

(a) ability to carry the burden of goods
(b) maximum population that can be sustained by an ecosystem
(c) capacity to hold an ecosystem

114. Population density is

(a) population size of a country
(b) number of people per sq. km of an area
(c) population growth per year

115. Watershed is defined as

(a) a water course
(b) drainage basin of a water course of a river or stream enclosed by hills
(c) waterfalls

116. Greenhouse gases are

(a) carbon monoxide and sulphur dioxide
(b) carbon dioxide, methane, ozone
(c) chloroform, ether

117. El Nino is

(a) atmospheric phenomenon
(b) volcanic activity
(c) ocean warming phenomenon

118. Odour pollution arises from

(a) garbage heap, sewage water, etc.
(b) flowery plants
(c) public urinals and toilets

119. Hydroelectricity is generated from

(a) lakes and ponds
(b) water reservoir of river dam
(c) coal plants

120. Non-living components of ecosystem are

(a) Biotic
(b) Abiotic
(c) Free living
(d) None

121. Acid rain is caused by the oxides of

(a) SO2
(b) NO2
(c) Both

122. Converting solid waste into new products by using resources contained in the discarded material is

(a) Waste management
(b) Reuse
(c) Recycling

123. Which amongst the following is decomposer in ecosystem?

(a) Green plant
(b) Animal
(c) Bacteria
(d) (a) and (b)

124. Acidity in rain is measured by

(a) Barometer
(b) Hygrometer
(c) Ammeter
(d) pH meter

125. The process by which anaerobic decomposition of organic matter by bacteria gives out a bad smell is

(a) Decomposition
(b) Fermentation
(c) Putrefaction

126. Profuse growth of aquatic vegetation that often changes the colour of water and reduces the dissolved oxygen content is called

(a) Algal bloom
(b) Eutrophication
(c) Fermentation
(d) (a) and (b)

127. Montreal Protocol signed in September 1987 aims at the control of

(a) Use of ozone-depleting substances
(b) Use of greenhouse gases
(c) Use of chemical pesticides

128. Stone cancer or stone leprosy is caused by

(a) UV rays
(b) Greenhouse effect
(c) Acid rain
(d) Ozone depletion

129. Tree hugging movement is

(a) Chipko Andolan
(b) Green movement
(c) Silent Valley movement

130. Rio declaration refers to

(a) Earth Summit in June 1992
(b) Ramsar Conference
(c) Stockholm Conference 1972

131. World Environment Day is observed on

(a) April 22
(b) June 22
(c) June 5

132. Ozone layer depletion occurs in

(a) Stratosphere
(b) Troposphere
(c) Ionosphere

133. Global warming is caused by

(a) Acid rain
(b) Ozone depletion
(c) Greenhouse gases

134. The source of oxygen in atmosphere is due to

(a) Respiration
(b) Excretion
(c) Photosynthesis

135. The scale that measures the magnitude of earthquake is

(a) Kelvin scale
(b) Fahrenheit scale
(c) Richter scale

136. At the time of formation of earth, free oxygen in atmosphere was

(a) Available
(b) Not available

137. CFC is

(a) Chlorofluorocarbon
(b) Centre for fuel control
(c) Carcinogenic fluoride compound

138. Which amongst the following is primary consumer?

(a) Bacteria
(b) Tiger
(c) Goat
(d) Vulture

139. Of the following, water-borne disease is

(a) Small pox
(b) Cholera
(c) Diabetes

140. The earliest traces of life on earth have been found in the rocks of

(a) 3.5-trillion years old
(b) 3.5-billion years old
(c) 3.5-million years old

141. Richter scale is used for measuring

(a) Velocity of light
(b) Intensity of sound
(c) Amplitude of seismic waves

142. Bhopal gas disaster occurred in

(a) 1964
(b) 1974
(c) 1984

143. In 1986, nuclear plant disaster took place in

(a) London
(b) Chernobyl
(c) Three Miles

144. First UN Conference on Environment was held in

(a) Johannesburg
(b) Stockholm
(c) Montreal

145. Which one of the following gases is most abundant in atmosphere?

(a) Methane
(b) Nitrogen
(c) CFC

146. The interior-most layer of the earth is known as

(a) Core
(b) Crust
(c) Mantle

147. The landmass of the earth is known as

(a) Biosphere
(b) Lithosphere
(c) Stratosphere

148. Mangroves are found in

(a) Pushkar lake
(b) Sunderbans
(c) Loktak lake

149. Which one of the following is a pollution-free renewable resource?

(a) Fossil fuel
(b) Solar energy
(c) Wood

150. What is the name of the supercontinent which broke into the present day continents?

(a) Pampas
(b) Palaearctic
(c) Pangaea

151. Ozone hole is present in

(a) Biosphere
(b) Troposphere
(c) Stratosphere

152. Which one of the following is an autotroph?

(a) Green plant
(b) Fungus
(c) Fish

153. Human malaria is transmitted by

(a) Anopheles male
(b) Anopheles female
(c) Culex male

154. The safe intensity level of sound is

(a) 85 decibel
(b) 75 decibel
(c) 65 decibel

155. Silent Valley is in

(a) Andhra Pradesh
(b) Himachal Pradesh
(c) Kerala

156. Which one of the following is not a gaseous cycle?

(a) Oxygen cycle
(b) Phosphorus cycle
(c) Nitrogen cycle

157. Which one of the countries is known as the land of monsoon?

(a) Russia
(b) India
(c) Australia

158. The earth receives major energy from

(a) Sun
(b) Moon
(c) Mars

159. Which one of the following does not contain biomass?

(a) Municipal garbage
(b) Sewage
(c) Metal

160. Seismograph is used for the measurement of

(a) Earthquake
(b) Intensity of light
(c) Humidity

161. Jaldapara is famous for the conservation of

(a) Tiger
(b) Rhinoceros
(c) Elephant

162. Earth Day is celebrated on

(a) 5th June
(b) 12th May
(c) 22nd April

163. The mean temperature of Earth is approximately

(a) 10°C
(b) 15°C
(c) 20°C

164. Cholera is a

(a) Vector-borne disease
(b) Water-borne disease
(c) Air-borne disease

165. India is a megadiversity country with

(a) 4 ecological hotspots
(b) 3 ecological hotspots
(c) 2 ecological hotspots

166. The permissible upper limit of Arsenic in water is

(a) 0.05 mg per litre
(b) 0.005 mg per litre
(c) 0.5 mg per litre

167. An ecological thinking in which no particular importance is given to man

(a) Social ecology
(b) Human ecology
(c) Deep ecology

168. The novel ‘Aronnyok’ is written by

(a) Rabindra Nath Tagore
(b) Bibhutibhusan Bandopadhyay
(c) Jibanananda Das

169. The historic Earth Summit held at Rio, Brazil in June 1992 is known as

(a) UNCED
(b) UNIDO
(c) UNESCO

170. Ramsar Convention includes one of the following

(a) Rabindra Sarovar
(b) Subhas Sarovar
(c) East Kolkata wetland

171. The lowest layer of atmosphere

(a) Ionosphere
(b) Troposphere
(c) Stratosphere

172. Bhopal gas disaster caused by the gas is

(a) Carbon monoxide
(b) Chlorofluorocarbon
(c) Methyl isocyanate

173. ‘Arabari Model’ in West Bengal is famous for

(a) Joint Forest Management
(b) Rainwater Harvesting
(c) Solar Power Plant

174. The global human population is around

(a) 480 crores
(b) 620 crores
(c) 760 crores

175. The name of Sundarlal Bahuguna is related to

(a) Chipko Movement
(b) Narmada Bachao
(c) Silent Valley

176. The famous 3P formula on environment is

(a) Power-Production-Price
(b) Population-Poverty-Pollution
(c) Principle of Population Problem

177. On earth, the autotrophic components can directly fix

(a) Chemical energy
(b) Mechanical energy
(c) Light energy

178. The unit of dose of ionising radiation is

(a) ROM
(b) RAD
(c) CAD

179. B.O.D. determines the health of

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

180. Rachel Carson is the writer of the following book

(a) Biodiversity
(b) Silent Spring
(c) Silent Valley

181. 5th June is observed as:

(a) Earth Day
(b) Environment Day
(c) Biodiversity Day

182. A chronic disease called ‘Silicosis’ involves:

(a) Heart
(b) Lung
(c) Liver

183. A Bengali novel of forestry and environment is

(a) ‘Rupashi Bangla’
(b) ‘Sabhyatar Sankat’
(c) ‘Aronnyok’

184. Pollen can cause

(a) Typhoid
(b) Malaria
(c) Allergy

185. Free-floating microscopic organisms are known as

(a) Nekton
(b) Plankton
(c) Periphyton

186. What happened in India in 1984?

(a) Chipko Movement
(b) Bhopal gas disaster
(c) Narmada Bachao Andolan

187. Lithosphere represents the earth’s

(a) Water
(b) Land
(c) Life

188. Chernobyl nuclear power disaster took place in

(a) 1984
(b) 1986
(c) 1988

189. Plasmodium vivax can cause

(a) Filaria
(b) Malaria
(c) Dengue

190. The name of Rabindra Nath Tagore is connected with

(a) Joint Forest Management
(b) Vanamahotsava
(c) Tree-hugging movement

191. The physical space occupied by an organism is known as

(a) Niche
(b) Habitat
(c) Ecotone

192. Earthquake is measured by

(a) Electroencephalograph
(b) Seismograph
(c) Barometer

193. ‘Study of habitat’ is known as

(a) Ecology
(b) Entomology
(c) Ethology

194. Aggregation of organisms of different populations refers to

(a) Density
(b) Diversity
(c) Population

195. Following is a primary consumer

(a) Green plant
(b) Deer
(c) Tiger

196. Biological control refers to

(a) Control of an organism by another organism
(b) Control of an organism by using pesticide
(c) Control of organism by themselves

197. Earth is a

(a) Planet
(b) Galaxy
(c) Star

198. ‘Agenda-21’ refers to

(a) 1972 Stockholm Summit
(b) 1992 Rio Summit
(c) 2002 Johannesberg Summit

199. Following is not found in natural condition in India

(a) Tiger
(b) Zebra
(c) Rhinoceros

200. International Biodiversity Day” is celebrated on:

(a) 22 March
(b) 22 April
(c) 22 May
(d) 22 June

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200 Environment Related Multiple Choice Questions (MCQ)

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