Environment Quiz
May 19, 2019 by Veerendra
Environment Quiz
Environment Quiz
Environment stands for surrounding and it
has been defined as the sum total of all
conditions and influences that affect the
development of an organism. Here, we
are giving the Environment Quiz
Questions with answers on the Basic
Concepts of Environment and Ecology in
the form of multiple choice questions
which strengthen the knowledge of
aspirants who are preparing for the
competitive Exams.
Environment Quiz Questions 1 to 10
1. Name the atmospheric layer closest to
the ground
A.Troposphere
B.Mesosphere
C.Thermosphere
D.Stratosphere
Answer: Troposphere
2. The most abundant gas on the earth’s
atmosphere is
A.Oxygen
B.Carbon
C.Nitrogen
D.Hydrogen
Answer: Nitrogen
3. What atmospheric layer has most of
the clouds?
A.Mesosphere
B.Thermosphere
C.Exosphere
D.Troposphere
Answer: Troposphere
4. An altitude of 100 kilometres (62 mi;
330,000 ft) above the Earth’s sea level
marks the beginning of space where
human travellers are considered
astronauts. What is it called?
A.Appleton–Barnett layer
B.Karman line
C.Heaviside layer
D.Van Allen belts
Answer: Karman line
5. The study of weather is called?
A.meteorology
B.climatology
C.aeronomy
D.aerology
Answer: meteorology
6. Which one of the following is NOT a
primary layer of the atmosphere?
A.Mesosphere
B.Troposphere
C.Exosphere
D.Stratosphere
Answer: Exosphere
7. A millimetre of mercury is a manometric
unit of pressure, defined as precisely
133.322387415 pascals. What is the
symbol for a millimetre of mercury?
A.hhMg
B.MPA
C.mmHg
D.inHg
Answer: mmHg
8. Name the atmospheric layer that is
completely cloudless and free of water
vapor.
A.Exosphere
B.Troposphere
C.Thermosphere
D.Stratosphere
Answer: Thermosphere
9. The ozone layer or ozone shield is a
region of Earth’s atmosphere that absorbs
most of the Sun’s ultraviolet (UV)
radiation. Which layer of the atmosphere
contains ozone layer?
A.Troposphere
B.Mesosphere
C.Thermosphere
D.Stratosphere
Answer: Stratosphere
10. What is the average atmospheric
pressure at sea level as defined by the
International Standard Atmosphere?
A.101325 pascals
B.14.6959 pascals
C.1013 pascals
D.984.43 pascals
Answer: 101325 pascals
Environment Quiz Questions 11 to 30
11. Who coined the word ‘ecology’?
a. Ernst Haeckel
b. Charles Darwin
c. Gregory Mendel
Answer: a
12. What are saprophytes?
a. Living beings that feed on the sap from
tree bark
b. Living beings that feed on dead or
decayed organic matter
c. Living beings that feed on other living
beings.
Answer: b
13. Who are ethologists?
a. Scientists who study about ethos
b. Scientists who study about the
behaviour of wild animals
c. Scientists who study about the
behaviour of animals in a particular eco
system.
Answer: b
14. What are terricolous animals?
a. Animals that live in a particular territory
b. Animals that live on high mountains
c. Animals that live in the soil
Answer: c
15. What are arboreal animals?
a. Animals living in trees
b. Animals living in water
c. Animals living in marshy lands
Answer: a
16. Who is known as the father of
evolution?
a. Gregory Mendel
b. Charles Darwin
c. Albert Einstein
Answer: b
17. Which of the following is an
amphibian?
a. Salamanders
b. Lizards
c. Fish
Answer: a
18. What is the safe level of noise intensity
for humans?
a. Up to 90 decibels
b. up to 70 decibels
c. up to 80 decibels
Answer: c
19. The region of air close to the earth
and extending up to 10km high is called
a. Atmosphere
b. Stratosphere
c. Troposphere
Answer: c
20. What are planktons?
a. Plants living in water
b. Very small plants and animals living in
water
c. Very small animals living on land
Answer: b
21. What is the meaning of the term
‘abyssopelagic’?
a. Organisms living at water depths
greater than 2000 m
b. Organisms living at water depths
greater than 4000 m
c. Organisms living at water depths
greater than 3000m
Answer: b
22. The production of light by living beings
is known as
a. Bio-luminescence
b. Bio-lighting
c. Bio-fluorescence
Answer: a
23. Which country is popularly knowns as
‘land of the windmills’?
a. The Netherlands
b. Poland
c. Norway
Answer: a
29. The major diet of pandas is
a. Acacia leave
b. Bamboo
c. Grass
Answer: b
30. Which of the following is not an
endangered animal?
a. Siberian tiger
b. Loggerhead turtle
c. The Maned Wolf.
Answer: c
Environment Quiz Questions 31 to 60
24. Who was the first man to travel in
space?
a. Edwin Aldrin
b. Neil Armstrong
c. Yuri Gagarin
Answer: c
25. Which instrument is used to measure
wind velocity?
a. Barometer
b. Anemometer
c. Hygrometer
Answer: b
26. What is the instrument used to detect
earthquakes?
a. Radiometer
b. Barometer
c. Seismograph
Answer: c
27. What is the unit in which radio activity
is measured?
a. Newton
b. Roentgen
c. Decibel
Answer: b
28. The region of the atmosphere above
400 km and higher is known as
a. Exosphere
b. Mesosphere
c. Thermosphere
Answer: a
31.Finding Nemo is a 2003 American
computer-animated comedy-drama
adventure film which tells the story of the
fish named Marlin who, along with a regal
blue tang named Dory, searches for his
abducted son Nemo all the way to
Sydney Harbour. What species of a fish is
Nemo?
A.Godfish
B.Clownfish
C.surgeonfish
D.Blowfish
Answer – Clownfish
32.The film ‘Happy Feet’ features a
species of penguins that inhabit the
continent of Antarctica. Name this
species of penguin.
A.King Penguin
B.Gentoo Penguin
C.Emperor Penguin
D.Little blue penguin
Answer – Emperor Penguin
33.World Wetlands Day is observed on
A.February 2
B.February 28
C.February 22
D.February 12
Answer – February 2
34.Agrostology is the study of
A.Plants
B.Agriculture
C.Algae
D.Grasses
Answer – Grasses
35.What does an anemologist study?
A.Animals
B.Names
C.Wind
D.Atoms
Answer – Wind
36.Name the largest freshwater lake in
Northeast India
A.Gurudongmar Lake
B.Loktak Lake
C.Lake Tsongmo
D.Dipor Beel
Answer – Loktak Lake
37.Do you know the only floating park in
the world, located in North East India?
A.Keibul Lamjao National Park
B.Kanchendzonga National Park
C.Dibru-Saikhowa National Park
D.Manas National Park
Answer – Keibul Lamjao National Park
38.The sangai is an endemic, rare and
endangered subspecies of brow-antlered
deer. In which state it is found?
A.Gujarat
B.Sikkim
C.Manipur
D.Meghalaya
Answer – Manipur
39.The Ramsar Convention is an
international treaty for the conservation
and sustainable use of wetlands.[1] It is
also known as the Convention on
Wetlands. What does Ramsar stand for?
A.An environmentalist
B.A city
C.An endangered animal
D.A Greek God
Answer – A city
40.Which of these areas has been
designated as the area with the greatest
concentration of marine biodiversity on
planet Earth?
A.Raja Ampat, Indonesia
B.Great Barrier Reef, Australia
C.Andaman Islands, India
D.Galapagos islands
Answer – Raja Ampat, Indonesia
41.This islands are famed for their vast
number of endemic species and were
studied by Charles Darwin during the
voyage of the Beagle.
A.Raja Ampat, Indonesia
B.Great Barrier Reef, Australia
C.Andaman Islands, India
D.Galapagos islands
Answer – Galapagos islands
42.The Encantadas, or Enchanted Isles” is
a novella by American author Herman
Melville which consists of ten
philosophical “Sketches” on the islands.
Which one of the following is referred to
as Enchanded Isles?
A.Andaman Islands, India
B.Galapagos islands
C.Coronado Island
D.Greenland
Answer – Galapagos islands
43.The microbes that are active at low
temperatures
A.thermophiles
B.Mesophiles
C.Psychrophiles
D.neutrophiles
Answer – Psychrophiles
44.Sick Building Syndrome (SBS) describes
which phenomenon?
A.Indoor air pollution
B.Indoor water pollution
C.Indoor noise pollution
D.All the above
Answer – Indoor air pollution
45.The energy possessed by a body by
virtue of its position relative to others
A.Kinetic energy
B.Potential energy
C.Chemical energy
D.Positional energy
Answer – Potential energy
46.The outermost layer of Earth’s
atmosphere or the upper limit of the
atmosphere is
A.Thermosphere
B.Exosphere
C.Ionosphere
D.Mesosphere
Answer – Exosphere
47.To be classified as a hurricane in the
Saffir Simpson hurricane wind scale
(SSHWS), a tropical cyclone must have
maximum sustained winds of at least
A.74 mph
B.100 mph
C.50 mph
D.80 mph
Answer – 74 mph
48.The injection of fertilizers, soil
amendments, and other water-soluble
products into an irrigation system is
termed as
A.Fertilization
B.Fertigation
C.Drip irrigation
D.Foliar feeding
Answer – Fertigation
49.What does UNEP stand for?
A.United Nations Educational Plan
B.United Nations Environmental Protection
C.United Nations Environmental
Programme
D.United Nations Environmental Policy
Answer – United Nations Environmental
Programme
50.The head quarters of UNEP is at
A New York
B.Geneva
C.Sockholm
D.Nairobi
Answer – Nairobi
51.Name the intergovernmental body
under the auspices of the United Nations
that shared the 2007 Nobel Peace Prize
with Al Gore, former U.S. Vice President
A.WTO
B.UNEP
C.UNESCO
D.IPCC
Answer – IPCC
52.Who was the Chairman of IPCC in 2007
when it was awarded Nobel Peace Prize?
A.Hoesung Lee
B.RK Pachauri
C.Bert Bolin
D.Robert Watson
Answer -RK Pachauri
53.Which camel species has two humps
on its back?
A.Arabian camel
B.Australian camel
C.Bactrian camel
D.dromedary camels
Answer – Bactrian camel
54.OPEC is the Organization of Petroleum
Exporting Countries which was founded
at a meeting on September 14, 1960.
Which one of the following was NOT a
founding member?
A.Qatar
B.Iran
C.Iraq
D.Venezuela
Answer – Qatar
55.By 2040, the world s population is
expected to rise to approximately
A.7 billion
B.9 billion
C.12 billion
D.20 billion
Answer – 9 billion
56.Project Tiger is a tiger conservation
programme launched by the
Government of India ensuring a viable
population of Bengal tigers in their natural
habitats and also to protect them from
extinction. Which year it was launched?
A.1973
B.1975
C.1978
D.1970
Answer – 1973
57.Name India’s first national park
A.Manas National Park
B.Gir Forest National Park
C.Bandhavgarh National Park
D.Hailey National Park
Answer – Hailey National Park
58.Which state in India has got its own
Wildlife Act and not covered under
Wildlife Protection Act, 1972?
A.Kerala
B.Karnataka
C.Jammu and Kashmir
D.Assam
Answer – Jammu and Kashmir
59.The Hollywood movie “Jurassic Park”
was based on the novel with the same
name written by
A.Robin Cook
B.Michael Crichton
C.Agatha Christie
D.Jules Verne
Answer – Michael Crichton
60.The first asteroid, today known as the
largest member of the asteroid belt, was
discovered by Giuseppe Piazzi in 1801.
Name the asteroid.
A.Ceres
B.Vesta
C.Pallas
D.Hygiea
Answer – Ceres
Environment Quiz Questions 61 to 90
61.Which is the longest mountain range in
the world?
A Karakoram
B.Rockies
C.Himalayas
D.Andes
Answer : Andes
62.Which country ratified the Kyoto
Protocol in late 2004 and thus caused it to
become an international law?
A.US
B.Russia
C.Japan
D.France
Answer : Russia
63.The natural process of the atmosphere
heating through the trapping of reradiated infrared radiation is known as
A. The green house effect
B. Thermal inversion
C. Solar heating
D. Global warming
Answer : The green house effect
64.About how much of the wold’s land
area is tropical rainforests?
A.2 per cent
B.7 per cent
C.10 per cent
D.15 per cent
Answer :
65.Temperate forests are likely to have
which of the following species of trees?
A.Pine
B.Spruce
C.Redwood
D.All the above
Answer : All the above
66.In what type of bioregion is
desertification is most likely to occur?
A.Tropical Forests
B.Temperate Forests
C.Coniferous Forests
D.Grasslands
Answer : Grasslands
67.Around the North Pole of Earth, tiny
electrically charged particles high in the
atmosphere react with rays from the sun
to create beautiful sheets of light. Theser
are called
A.Aurora Borealis
B.Aurora Australis
C.Aurora Solaris
D.None of the above
Answer : Aurora Borealis
68.PVC is a very toxic form of plastic.
What is the full form of PVC?
A.Plastic vinyl compounds
B.Polymer vinyl chloride
C.Polyvinyl chloride
D.Polyvinyl camphor
Answer : Polyvinyl chloride
69.Which Bollywood actor was the
ambassador of the Earth Hour 2009 in
India?
A.Shahrukh Khan
B.Naseruddin Shah
C.Anupam Kher
D.Aamir Khan
Answer : Aamir Khan
70.Which of the following materials can
be recovered from the recycling of soft
drink cans?
A.Paper
B.Plastic
C.Metal
D.Glass
Answer : Metal
71. Coined the word ‘ecology’?
A. Ernst Haeckel
B. Charles Darwin
C. Gregory Mendel
D. Albert Einstein
Answer : Ernst Haeckel
72. What are saprophytes?
A Living beings that feed on the sap from
tree bark
B. Living beings that feed on dead or
decayed organic matter
C. Living beings that feed on other living
beings.
D. Living beings that feed on dead or
decayed inorganic matter
Answer : Living beings that feed on dead
or decayed organic matter
73. Who are ethologists?
A. Scientists who study about ethos
B. Scientists who study about the
behaviour of wild animals
C. Scientists who study about the
behaviour of animals in a particular eco
system.
D. Scientists who study about the
Answer : Scientists who study about the
behaviour of wild animals
74. What are terricolous animals?
A. Animals that live in a particular territory
B. Animals that live on high mountains
C. Animals that live in the soil
D. Animals that live in a particular region
Answer : Animals that live in the soil
75. What are arboreal animals?
A. Animals living in trees
B Animals living in water
C. Animals living in marshy lands
D. Animals living in water and land
Answer : Animals living in trees
76. Who is known as the father of
evolution?
A. Gregory Mendel
B. Charles Darwin
C. Albert Einstein
D. Ernst Haeckel
Answer : Charles Darwin
77.Which of the following is an
amphibian?
A. Salamanders
B. Lizards
C. Fish
D. Snake
Answer : Salamanders
78. What is the safe level of noise intensity
for humans?
A. Up to 90 decibels
B. up to 70 decibels
C. up to 80 decibels
D. Up to 60 decibels
Answer : up to 80 decibels
79. The region of air close to the earth
and extending up to 10km high is called
A. Atmosphere
B. Stratosphere
C. Troposphere
D. Barometer
Answer : Troposphere
80. What are planktons?
A. Plants living in water
B. Very small plants and animals living in
water
C. Very small animals living on land
D. Plants living on land
Answer : Very small plants and animals
living in water
81. What is the meaning of the term
‘abyssopelagic’?
A. Organisms living at water depths
greater than 2000 m
B. Organisms living at water depths
greater than 4000 m
C. Organisms living at water depths
greater than 3000m
D. Organisms living at water depths
greater than 1000m
Answer : Organisms living at water depths
greater than 4000 m
82. The production of light by living beings
is known as
A. Bio-luminescence
B. Bio-lighting
C. Bio-fluorescence
D. Bio-diversity
Answer : Bio-luminescence
83. Which country is popularly knowns as
‘land of the windmills’?
A. The Netherlands
B. Poland
C. Norway
D. Japan
Answer : The Netherlands
84. Who was the first man to travel in
space?
A. Edwin Aldrin
B. Neil Armstrong
C. Yuri Gagarin
D. Gregory Mendel
Answer : Yuri Gagarin
85. Which instrument is used to measure
wind velocity?
A. Barometer
B. Anemometer
C. Hygrometer
D. Radiometer
Answer : Anemometer
86. What is the instrument used to detect
earthquakes?
A. Radiometer
B. Barometer
C. Seismograph
D. Anemometer
Answer : Seismograph
87. What is the unit in which radio activity
is measured?
A. Newton
B. Roentgen
C. Decibel
D. Gagarin
Answer : Roentgen
88. The region of the atmosphere above
400 km and higher is known as
A. Exosphere
B. Mesosphere
C. Thermosphere
D. Atmosphere
Answer : Exosphere
89. The major diet of pandas is
A. Acacia leave
B. Bamboo
C. Grass
D. Tree
Answer : Bamboo
90. Which of the following is not an
endangered animal?
A. Siberian tiger
B. Loggerhead turtle
C. The Maned Wolf
D. Indian tiger
Answer : The Maned Wolf
Environment Quiz Questions 91 to 115
91. The non-point pollution of river water
involves discharge of pollutants through
a) urban sewage drains
b) industrial effluents
c) agricultural fields
d) both (a) and (b)
Answer: c) agricultural fields
92. With reference to forest ecosystems,
consider the following statements :
1. The number pyramid is neither inverted
nor upward.
2. The biomass pyramid is inverted.
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) 1 only
93. Man causes soil erosion through
1. use of improper ploughing methods.
2. leaving roots of crop in the field after
harvest.
3. practicing trash farming.
4. use of heavy machines.
Select the correct answer using the
codes given below.
a) 1, 2 and 3 only
b) 1 and 4 only
c) 1, 3 and 4 only
d) 1, 2, 3 and 4 only
Answer: b) 1 and 4 only
94. Which of the following is a part of the
biogeochemical cycle ?
1. soils
2. plants
3. atmosphere
4. oceans
Select the correct answer using the
codes given below.
a) 1, 2 and 3 only
b) 1 ,3 and 4 only
c) 2 ,3 and 4 only
d) 1 ,2, 3 and 4
Answer: d) 1 ,2, 3 and 4
95. Which of the following evidences
support the theory of gradual rise in air
temperature and consequent global
warming?
1. spreading of tropical diseases towards
temperate regions.
2. downward shifting of snow lines of
tropical mountains.
3. freezing of permafrost areas.
Select the correct answer using the
codes given below.
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1 and 3 only
Answer: a) 1 only
96. In ecological terms, what does the
term “standing crop” signify ?
a) total weight of whole organic matter
b) total weight of heterotrops
c) total area covered by crops
d) None of the above
Answer: a) total weight of whole organic
matter
97. Biofuels are fuels extracted from plants
and crops and these have various
advantages. These include
1. increasing agricultural diversity.
2. reduced use of fertilizers.
3. renewable source of energy.
Select the correct answer using the
codes given below.
a) 1 and 3 only
b) 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer: b) 3 only
98. Which among these would increase
carbon dioxide in the atmosphere ?
1. deforestation
2. burning of firewood
3. automobiles
Select the correct answer using the
codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer: d) 1, 2 and 3
99. The sources of mercury pollution
include
1. coal fired thermal power plants.
2. supersonic jets.
3. automobiles.
4. waste incinerators
Select the correct answer using the
codes given below.
a) 1, 2 and 3 only
b) 1, 3 and 4 only
c) 1 and 3 only
d) 1 and 4 only
Answer: b) 1, 3 and 4 only
100. The energy flow in an ecosystem is :
1. unidirectional
2. non-cyclic
3. cyclic
4. bidirectional
Select the correct answer using the
codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 4 only
d) 3 and 4 only
Answer: a) 1 and 2 only
101. A balanced ecosystem is one in
which the
1. number of organisms at all levels is
equal.
2. amount of biomass at all trophic levels
is equal.
3. organisms are interdependent on each
other.
Select the correct answer using the
codes given below.
a) 1 and 2 only
b) 2 only
c) 3 only
d) none
Answer: d) none
102. Ozone depletion would impact the
plant community in several ways. These
include :
1. increase in photosynthesis
2. decline in water use efficiency
3. decline in yield of plants
Select the correct answer using the
codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer: c) 2 and 3 only
103. With to the IUCN classification,
extinct species are those which have
been:
1. completely eliminated from wild areas.
2. completely eliminated from managed
areas.
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) Both 1 and 2
104. Which among these is/are a
cryogenic indicator of climate change ?
1. ice sheets and ice chores
2. sea level changes
3. lacustrine deposists
Select the correct answer using the
codes given below.
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2 and 3
Answer: a) 1 only
105. The Great Indian Bustard is a critically
endangered species. Its population has
been declining due to
1. habitat loss
2. frequent poaching
3. construction of windmills
Select the correct answer using the
codes given below.
a) 1 only
b) 1 and 2 only
c) 2 only
d) 1, 2 and 3
Answer: d) 1, 2 and 3
106. The National Air Quality Monitoring
Programme (NAMP) run by Central
Pollution Control Board, monitors which of
the following pollutants at all locations ?
1. carbon dioxide
2. sulphur dioxide
3. oxides of nitrogen
4. suspended particulate matter
Select the correct answer using the
codes given below.
a) 1, 2 and 3 only
b) 1 ,3 and 4 only
c) 2 ,3 and 4 only
d) 1 ,2, and 4 only
Answer: c) 2 ,3 and 4 only
107. With reference to Biological Oxygen
Demand (BOD) and Chemical Oxygen
Demand (COD), consider the following
statements:
1. BOD is a measurement of consumed
oxygen by aquatic microorganisms to
decompose organic matter.
2. COD refers to the requirement of
dissolved oxygen for the oxidation of
organic constituents.
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) 1 only
108. The ecological processes follow the
principle of uniformitarianism. This means :
a) the ecological processes have a
uniform effect
b) same physical and biological
processes that operates today operated
in the past.
c) physical and biological processes
operate with a uniform rate
d) None of the above
Answer: b) same physical and biological
processes that operates today operated
in the past.
109. Fertlizers are added to supply mainly
three nutrients – Nitrogne (N),
Phosphorous (P) and Potassium (K).
Biofertlizers can supply which of these
nutrients?
1. Nitrogen
2. Phosphorous
3. Potassium
Select the correct answer using the
codes given below.
a) 1 only
b) 1 and 2 only
c) 1 and 3 only
d) 1, 2 and 3
Answer: d) 1, 2 and 3
110. Which among the following are
mechanical method of soil conservation
?
1. bunding
2. terracing
3. contour farming
4. stubble mulching
Select the correct answer using the
codes given below.
a) 1, 2 and 3 only
b) 1 ,3 and 4 only
c) 2 ,3 and 4 only
d) 1 ,2, and 4 only
Answer: a) 1, 2 and 3 only
111. Which of the following is/are have
been provided for in the Wildlife
Protection Act, 1972?
1. National Parks
2. Wildlife Sanctuaries
3. Biosphere Reserves
Select the correct answer using the
codes given below.
a) 1 only
b) 1 and 2 only
c) 1 and 3 only
d) 2 and 3 only
Answer: b) 1 and 2 only
112. Which of the following Tiger reserves
is/are also a National Park ?
1. Manas
2. Indravati
3. Namdapha
4. Sariska
Select the correct answer using the
codes given below.
a) 1,2 and 3 only
b) 1,3 and 4 only
c) 2,3 and 4 only
d) 1,2,3 and 4
Answer: d) 1,2,3 and 4
113. The brown haze dome formed in
cities is because of which gas?
a) sulphur dioxide.
b) nitrogen oxide.
c) carbon dioxide.
d) volatile organic compounds (VOCs).
Answer: b) nitrogen oxide
114. 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
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer : d) 1, 2 and 3
115. A biofertilizer helps in increasing the
supply of primary nutrients to plants.
Which of the following is/are examples of
biofertilizers?
1. Azotobacter
2. Rhizobium
3. Azospirillium
Select the correct answer using the
codes given below.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2 and 3
Answer: d) 1, 2 and 3