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MEDIUM
ENGLISH
Agriculture
Which of the following isotopes is most dangerous to Homo sapiens?
A
P32
Option A
B
Sr90
Option B
C
Cs137
Option C
D
I131
Option D
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MEDIUM
ENGLISH
Agriculture
The main cause of pollution in metro cities is due to:
A
Industries
Option A
B
Automobiles
Option B
C
Home fuel
Option C
D
Trees
Option D
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MEDIUM
ENGLISH
Agriculture
Carbon monoxide is a pollutant because:
A
It reacts with O2
Option A
B
It inhibits glycolysis
Option B
C
Reacts with haemoglobin
Option C
D
Makes nervous system inactive
Option D
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MEDIUM
ENGLISH
Agriculture
Green house effect refers to:
A
Cooling of earth
Option A
B
Trapping UV rays
Option B
C
Production of cereals
Option C
D
warming of earth
Option D
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MEDIUM
ENGLISH
Agriculture
The supersonic jets cause pollution by thinning of:
A
O3 layer
Option A
B
SO2 layer
Option B
C
O2 Layer
Option C
D
CO2 layer
Option D
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MEDIUM
ENGLISH
Agriculture
Measurement of the rate of O2 consumption in unit volume of water over a period of time is done to find out:
A
Biogas generation
Option A
B
Biological oxygen demand
Option B
C
Biosynthetic path way
Option C
D
Fermentation
Option D
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MEDIUM
ENGLISH
Agriculture
Biological control component is central to advanced agriculture production. Which of the following is used as a third generation pesticide?
A
Pathogens
Option A
B
Pheromones
Option B
C
Insect repellant
Option C
D
Insect hormone analogue
Option D
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MEDIUM
ENGLISH
Agriculture
The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen by (appro.)
A
20 times
Option A
B
100 times
Option B
C
2 times
Option C
D
200 times
Option D
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MEDIUM
ENGLISH
Agriculture
The maximum biomagnification would be in which of the following in case of aquatic ecosystem?
A
Fishes
Option A
B
Birds
Option B
C
Zooplanktons
Option C
D
Phytoplanktons
Option D
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MEDIUM
ENGLISH
Agriculture
Presence of SO2 in atmosphere is indicated by:
A
Mosses
Option A
B
Liver worts
Option B
C
Lichens
Option C
D
Ferns
Option D
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MEDIUM
ENGLISH
Agriculture
Minimata disease was caused due to the consumption of:
A
Sea food containing lot of cadmium
Option A
B
Fish contaminated with mercury
Option B
C
Oysters with lot of pesticide
Option C
D
Sea food contaminated with selenium
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following is the use of lichens in case of pollution?
A
They treat the polluted water
Option A
B
They act as bio-indicators of pollution
Option B
C
They promote pollution
Option C
D
Lichens are not related with pollution
Option D
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MEDIUM
ENGLISH
Agriculture
Effect of pollutions first and most marked on:
A
Natural balance of our ecological environment
Option A
B
Natural gaseous cycle
Option B
C
Natural geochemical cycle
Option C
D
Natural flora of a place
Option D
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MEDIUM
ENGLISH
Agriculture
Sewage drained into water bodies kills fishes because:
A
It gives off a bad small
Option A
B
It removes the food eaten by fishes
Option B
C
It increases the competition with fishes for dissolved oxygen
Option C
D
Excessive CO2 is added to water
Option D
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MEDIUM
ENGLISH
Agriculture
How CO emitted by automobiles prevents transport of O2 in the body tissues?
A
By changing O2 into CO
Option A
B
By destroying the haemoglobin
Option B
C
By forming a stable compound with haemoglobin
Option C
D
By obstructing the reaction of O2 with haemoglobin
Option D
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MEDIUM
ENGLISH
Agriculture
Every pesticide develops its own failure as its repeated use leads to:
A
The development of resistant pest varieties
Option A
B
Simplification of food web
Option B
C
Reduction in population of useful birds
Option C
D
Increase in weed population
Option D
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MEDIUM
ENGLISH
Agriculture
The major drawback of DDT as a pesticide is that:
A
Its cost of production is high
Option A
B
It is not rapidly degraded in nature
Option B
C
Organisms at once developed resistance to it
Option C
D
It is significantly less effective than other pesticides
Option D
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MEDIUM
ENGLISH
Agriculture
As compared to tap water the BOD of sewage polluted water shall be:
A
High
Option A
B
Low
Option B
C
Same
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
In big cities, air pollution is mainly due to:
A
Burning of fossil fuel
Option A
B
Thermal power plants
Option B
C
Sewage
Option C
D
Suspended particles
Option D
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MEDIUM
ENGLISH
Agriculture
If there were no CO2 in the earth’s atmosphere, the temperature of earth’s surface would have been:
A
same as present
Option A
B
Less than the present
Option B
C
Higher than the present
Option C
D
Dependent on the amount of O2 in the atmosphere
Option D
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