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MEDIUM
ENGLISH
Agriculture
Which of the following has the largest amount of energy?
A
Producers
Option A
B
Primary consumers
Option B
C
Secondary consumers
Option C
D
Disinfectants
Option D
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MEDIUM
ENGLISH
Agriculture
Food levels in an ecosystem are called:
A
Trophic levels
Option A
B
Consumer levels
Option B
C
Producer levels
Option C
D
Herbivores levels
Option D
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MEDIUM
ENGLISH
Agriculture
The snakes are included under:
A
Saprophytes
Option A
B
Primary consumers
Option B
C
Second trophic level
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
The term ‘bio-coenosis’ was coined by:
A
Tansley
Option A
B
Warming
Option B
C
Carl Mobius
Option C
D
S.C.Pandya
Option D
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MEDIUM
ENGLISH
Agriculture
Trophic levels are formed by:
A
Only plants
Option A
B
Only animals
Option B
C
Only carnivores
Option C
D
Organisms linked in food chains
Option D
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MEDIUM
ENGLISH
Agriculture
Biotic components of an ecosystem include:
A
Producers only
Option A
B
Consumers only
Option B
C
Producers and Consumers only
Option C
D
Producers, consumers and decomposers
Option D
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MEDIUM
ENGLISH
Agriculture
The greatest biomass of autotrophs in the world’s oceans is that of:
A
Benthic brown algae, coastal red algae and daphnids
Option A
B
Benthic diatoms and marine viruses
Option B
C
Sea-grasses and slime-molds
Option C
D
Free-floating microalgae, cyanobacteria and nanoplankton
Option D
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MEDIUM
ENGLISH
Agriculture
Which is the most stable ecosystem?
A
Mountain
Option A
B
Desert
Option B
C
Forest
Option C
D
Ocean
Option D
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MEDIUM
ENGLISH
Agriculture
Energy enters into the ecosystem through:
A
Herbivores
Option A
B
Carnivores
Option B
C
Producers
Option C
D
Decomposers
Option D
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MEDIUM
ENGLISH
Agriculture
Which are the biotic components of forest ecosystem?
A
Producers
Option A
B
Decomposers
Option B
C
Consumers
Option C
D
All of the above
Option D
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MEDIUM
ENGLISH
Agriculture
Which ecosystem has the highest primary productivity?
A
Pond ecosystem
Option A
B
Lake ecosystem
Option B
C
Grassland ecosystem
Option C
D
Forest ecosystem
Option D
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MEDIUM
ENGLISH
Agriculture
The flora and fauna in lakes and ponds represents:
A
Lentic biota
Option A
B
Latic biota
Option B
C
Abiotic
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
In an upright pyramid of biomass, the herbivores occupy the position:
A
4
Option A
B
2
Option B
C
3
Option C
D
1
Option D
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MEDIUM
ENGLISH
Agriculture
In food chain, herbivores are:
A
Producer
Option A
B
Primary consumer
Option B
C
Secondary consumers
Option C
D
Decomposers
Option D
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MEDIUM
ENGLISH
Agriculture
If phytoplanktons are destroyed from sea, then:
A
Algae will get more grow luxuriantly
Option A
B
Primary consumers will grow
Option B
C
Food chain will be effected
Option C
D
No effect will be seen
Option D
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MEDIUM
ENGLISH
Agriculture
Relative biological effectiveness (RBE) is usually referred to damages caused by:
A
Pollution
Option A
B
High temperature
Option B
C
Low temperature
Option C
D
Radiation
Option D
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MEDIUM
ENGLISH
Agriculture
Which part of the pond ecosystem does not affect by the temperature:
A
Epilimnion
Option A
B
Metalimnion
Option B
C
Hypolimnion
Option C
D
All of the above
Option D
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MEDIUM
ENGLISH
Agriculture
Ten percent law of energy transfer, in a food chain was enunciated by:
A
Elton
Option A
B
Heackel
Option B
C
Lindeman
Option C
D
Schimper
Option D
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MEDIUM
ENGLISH
Agriculture
When the number of organisms at successive levels are plotted, they assume the space of a pyramid. This is called the pyramid of:
A
Energy
Option A
B
Number
Option B
C
Biomass
Option C
D
Both (a) and (c)
Option D
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MEDIUM
ENGLISH
Agriculture
Tip of ecological pyramid is occupied by:
A
Herbivores
Option A
B
Carnivores
Option B
C
Producers
Option C
D
Decomposers
Option D
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