401.
What is B.O.D.
A
The amount of O2 utilised by organisms in water
B
The amount of O2 utilized by micro organisms for decomposition
C
The total amount of O2 present in water
D
All of the above
Answer :
The amount of O2 utilized by micro organisms for decomposition
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402.
Root cap is absent in
A
Mesophytes
B
Hydrophytes
C
Epiphytes
D
Xerophytes
Answer :
Hydrophytes
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403.
Aquatic photo diffraction is
A
Euphotic, disphotic and aphotic
B
Aphotic, Euphotic and disphotic
C
Euphotic, aphotic and disphotic
D
Euphotic, disphotic and aphotic
Answer :
Euphotic, disphotic and aphotic
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404.
Warm ocean surge of the Peru Current reoccurring every 5-8 years or so in the East Pacific of South America is widely known as
A
Gulf Stream
B
El Nino
C
Aye Aye
D
Magnox
Answer :
El Nino
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405.
The major source of water to the soil is
A
Ground water
B
Capillary water
C
Precipitation
D
Flood water
Answer :
Precipitation
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406.
Pneumatophore is present in
A
Rhizophora
B
Cholobranchia
C
Pistea
D
None of the above
Answer :
Rhizophora
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407.
With regard to ecological food chain, man is a
A
Consumer
B
Producer
C
Both consumer & producer
D
Decomposer
Answer :
Consumer
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408.
Bhopal gas tragedy is related with
A
Methane
B
Carbon mono oxide
C
Methyl Iso cyanate (MIC)
D
SO2
Answer :
Methyl Iso cyanate (MIC)
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409.
Maximum DDT in birds feeding on
A
Fishes
B
Meat
C
Insects
D
Seeds
Answer :
Fishes
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410.
Which of the following is not used for disinfection of drinking water?
A
Chlorine
B
Ozone
C
Chloramine
D
Phenyl
Answer :
Phenyl
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