431.
In pond ecosystem, diatoms represent
A
Producers
B
Primaryconsumers
C
Secondary consumers
D
Tertiary consumers
Answer :
Producers
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432.
Which of the following species in an endangered state
A
Indian bustard & rhinoceros
B
Asiatic donkey
C
Black buck
D
All of the above
Answer :
All of the above
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433.
Which biotic components mainly help in recycling of minerals
A
Producers
B
Consumers
C
Decomposers
D
All of the above
Answer :
Decomposers
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434.
In which biome a new plant may adapt soon
A
Tropical rain forest
B
Desert
C
Mangrove
D
Sea island
Answer :
Tropical rain forest
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435.
The main aim of plant conservation is
A
To conserve the necessary ecological activities and life supporting systems
B
To converge species diversity and range of genetic material
C
A and B both
D
None of the above
Answer :
A and B both
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436.
The number of primary producers within a specified area would be maximum in
A
Grassland ecosystem
B
Forestecosystem
C
Pond ecosystem
D
Deserts
Answer :
Pond ecosystem
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437.
Ecosystem term coined by
A
P. Maheshwari
B
Tansley
C
R. Mishra
D
P.Odum
Answer :
Tansley
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438.
What is the intensity of sound in normal conversation
A
10 - 20 decibal
B
30 - 60 decibal
C
70 - 90 decibal
D
120 - 150 decibal
Answer :
30 - 60 decibal
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439.
Acid rain is due to the pollution by
A
CO2
B
SO2 and NO2
C
Dust particles
D
Automobiles
Answer :
SO2 and NO2
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440.
Green house effect is
A
Gardening outside the house
B
Global cooling
C
Global warming
D
Green colour house
Answer :
Global warming
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