11.
In hilly regions, erosion can be minimised by
A
Terracing
B
Ploughing effectively
C
Manuring
D
Strip cropping
Answer :
Terracing
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12.
When peacock, eats snake which eats insects depends on green plants, the peacock is
A
A primary consumer
B
A primary decomposer
C
A final decomposer of plants
D
The apex of the food pyramid
Answer :
The apex of the food pyramid
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13.
Minimata disease first occurred in
A
Japan
B
China
C
Korea
D
Russia
Answer :
Japan
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14.
Green book contains
A
The list of endangered plants
B
The list of extinct plants
C
The list of rate plants grown in botanical gardens
D
Flora of certain area
Answer :
The list of rate plants grown in botanical gardens
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15.
Nepenthes is a
A
Primary producer
B
Consumer
C
Both primary producer and consumer
D
None of the above
Answer :
Both primary producer and consumer
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16.
dB is a standard abbreviation used for the quantitative expression of
A
the density of bacteria in a medium
B
a particular pollutant
C
the dominant Bacillus in a culture
D
a certain pesticide
Answer :
a particular pollutant
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17.
Terracing is an effective method of soil conservation in
A
Desert areas
B
Hilly areas
C
Plain areas
D
None of the above
Answer :
Hilly areas
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18.
Which of the following organism is likely to have more concentration of D.D.T. in its body?
A
Herbivores
B
Carnivores
C
Top carnivores
D
Primary producers
Answer :
Top carnivores
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19.
During food chain the maximum energy is stored in
A
Producers
B
Decomposers
C
Herbivores
D
Carnivores
Answer :
Producers
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20.
For biogas production besides dung which of the following need is recommended in our country
A
Mangifera India
B
Hydrilla
C
Eichhornia
D
Solanum
Answer :
Eichhornia
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