MCQs with Solutions for all Competitive Examinations

Environmental Science MCQs for Competitive Examination

Q. 1
The topmost portion of an ‘Energy Pyramid’ is

(A) Primary Producers
(B) Primary Consumers
(C) Secondary Consumers
(D) Decomposers

Answer: (A) Primary Producers
Explanation: N/A

Q. 2
Which part of a plant evaporates water?

(A) Stomata
(B) Fruit
(C) Branch
(D) Root

Answer: (A) Stomata
Explanation: N/A

Q. 3
Energy Flows in ecosystem is

(A) Unidirectional
(B) Bidirectional
(C) Multi directional
(D) None of the above

Answer: (A) Unidirectional
Explanation: N/A

Q. 4
Wild life week is celebrated on

(A) 2nd october to 8th october
(B) 15 th october to 21 st october
(C) 1st june to 7th june
(D) 15th june to 21st june

Answer: (A) 2nd october to 8th october
Explanation: N/A

Q. 5
Which of the following species is an example of link species?

(A) Clown fish
(B) Cuscuta
(C) Mycorrhiza
(D) Lichen

Answer: (A) Clown fish
Explanation: N/A

Q. 6
What type of radiation is trapped on the earth’s surface by the green house effect?

(A) Beta rays
(B) UV rays
(C) X rays
(D) IR rays

Answer: (D) IR rays
Explanation: Infrared rays

Q. 7
Species that occur in different geographical regions separated by special barrier

(A) Allopatric
(B) Sympatric
(C) Sibling
(D) None of the above

Answer: (A) Allopatric
Explanation: N/A

Q. 8
BAST is associated with

(A) Global warming
(B) Ozone holes
(C) Wild life
(D) Environmental management like ISO

Answer: (C) Wild life
Explanation: Board on Armed Force Science and Innovation (BAST)

Q. 9
The occurrence of pesticides like DDT in higher trophic levels is termed as

(A) Bioremediation
(B) Biomagnification
(C) Biological enhancement
(D) Biopollution

Answer: (B) Biomagnification
Explanation: N/A

Q. 10
Full form of CNG is

(A) Common National Gas
(B) Compressed Natural Gas
(C) Common Natural Gas
(D) Certified Natural Gas

Answer: (B) Compressed Natural Gas
Explanation: N/A

Q. 11
Which of the following interactions will not promote Co-evolution

(A) Commensalism
(B) Mutualism
(C) Parasitism
(D) Interspecific competition

Answer: (A) Commensalism
Explanation: N/A

Q. 12
Ozone layers is found in

(A) Thermosphere
(B) Stratosphere
(C) Troposphere
(D) Mesosphere

Answer: (B) Stratosphere
Explanation: N/A

Q. 13
Red data books contains data of

(A) All plant species
(B) All animal species
(C) Economically important species
(D) Threatened species

Answer: (D) Threatened species
Explanation: N/A

Q. 14
Minamata disease is due to

(A) Mercury
(B) Iodine
(C) Arsenic
(D) Cadmium

Answer: (A) Mercury
Explanation: N/A

Q. 15
Nuclear family refers to

(A) Any family born after 1950
(B) Family includes parents and their children
(C) Entire family including children, their parents and grandparents
(D) Only husband and wife

Answer: (B) Family includes parents and their children
Explanation: N/A

Q. 16
Carrier of Dengue disease is

(A) Aedes Mosquito
(B) Culex Mosquito
(C) Housefly
(D) Anopheles Mosquito

Answer: (A) Aedes Mosquito
Explanation: N/A

Q. 17

(A) increases towards the equator
(B) decreases towards the equator
(C) remains same throughout the planet
(D) has no effect on change in latitude

Answer: (A) increases towards the equator
Explanation: N/A

Q. 18
The unfavourable alteration of environment due to human activities is termed as

(A) Ecological disturbance
(B) Catastrophe
(C) Ecological degradation
(D) Pollution

Answer: (A) Ecological disturbance
Explanation: N/A

Q. 19
Which of the following is a biodegradable waste ?

(A) Plastics
(B) Polythene
(C) Glass
(D) None of these

Answer: (D) None of these
Explanation: N/A

Q. 20
The ratio between regional and local species diversity is measured as

(A) Alpha diversity
(B) Beta diversity
(C) Gamma diversity
(D) Delta diversity

Answer: (B) Beta diversity
Explanation: N/A

Q. 21
Main reason of continuous decreasing of wild life

(A) Predation
(B) Cutting down of forests
(C) Destruction of habitat
(D) Hunting

Answer: (C) Destruction of habitat
Explanation: N/A

Q. 22
The carrying capacity of population is determined by its

(A) Population growth rate
(B) Natality
(C) Mortality
(D) Limiting resources

Answer: (D) Limiting resources
Explanation: N/A

Q. 23
The formula for exponential population growth is

(A) dN/dt=rN
(B) dt/dN=rN
(C) dN/rN=dt
(D) rN/dN=dt

Answer: (A) dN/dt=rN
Explanation: N/A

Q. 24
Which of the following is not an air pollutant ?

(A) Smoke
(B) Carbon dioxide
(C) Nitrogen gas
(D) Sulphur-dioxide

Answer: (C) Nitrogen gas
Explanation: N/A

Q. 25
Which of the following is a renewable source of energy

(A) Coal
(B) Petroleum
(C) Plants
(D) Uranium

Answer: (C) Plants
Explanation: N/A

Q. 26
Cement factory labourers are prone to.

(A) Leukemia
(B) Bone marrow disease
(C) Asbestosis
(D) Cytosilicosis

Answer: (D) Cytosilicosis
Explanation: N/A

Q. 27
Growing agricultural crops between rows of planted trees is known as

(A) Social forestry
(B) Jhum
(C) Taungya system
(D) Agroforestry

Answer: (C) Taungya system
Explanation: N/A

Q. 28
The maximum number of individuals that can be supported by a given environment is called

(A) Carrying capacity
(B) Population size
(C) Biotic potential
(D) Environmental resistance

Answer: (A) Carrying capacity
Explanation: N/A

Q. 29
Which among the following Protocols/Conventions is dedicated for protecting biodiversity from the potential risks caused by Living Modified Organisms (LMO) from modern technology?

(A) Cartagena Protocols
(B) Nagoya Protocols
(C) Bonn Convention
(D) Vienna Convention

Answer: (A) Cartagena Protocols
Explanation: N/A

Q. 30
All species of Lemur are endemic to

(A) New Caledonia
(B) Seychelles Islands
(C) Galapagos Islands
(D) Madagaskar

Answer: (D) Madagaskar
Explanation: N/A

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