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MEDIUM
ENGLISH
Agriculture
Which of the following is an artificial ecosystem?
A
Rice-field
Option A
B
Forest
Option B
C
Grassland
Option C
D
Lake
Option D
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MEDIUM
ENGLISH
Agriculture
The rate of storage of food energy at consumer level is called:
A
Secondary productivity
Option A
B
Primary productivity
Option B
C
Gross productivity
Option C
D
Net productivity
Option D
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MEDIUM
ENGLISH
Agriculture
Savannahs are:
A
Tropical rain forest
Option A
B
Desert
Option B
C
Grassland with scattered trees
Option C
D
Dense forest with close canopy
Option D
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MEDIUM
ENGLISH
Agriculture
Source of energy in an ecosystem is:
A
Sun
Option A
B
ATP
Option B
C
Sugar made by plant
Option C
D
Green plant
Option D
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MEDIUM
ENGLISH
Agriculture
In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:
A
Primary and secondary consumers are similar
Option A
B
Both biotic and abiotic components are different
Option B
C
The biotic components are almost similar
Option C
D
The abiotic components are almost similar
Option D
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MEDIUM
ENGLISH
Agriculture
A food chain has the following trophic levels:
A
3 or 4
Option A
B
3
Option B
C
2
Option C
D
1
Option D
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MEDIUM
ENGLISH
Agriculture
Peacock eats a snake and snake eats frog and frog eats insect while insect eats green plant, then position of peacock is:
A
Primary producer
Option A
B
Secondary Producer
Option B
C
Decomposer
Option C
D
Apex of food pyramids
Option D
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MEDIUM
ENGLISH
Agriculture
In food chain initial organisms are:
A
Top consumers
Option A
B
Secondary consumers
Option B
C
Primary consumers
Option C
D
Photo synthesizers
Option D
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MEDIUM
ENGLISH
Agriculture
This is an inverted pyramid:
A
Pyramid of numbers in a grassland ecosystem
Option A
B
Pyramid of energy in a pond ecosystem
Option B
C
Pyramid of biomass in a grassland ecosystem
Option C
D
Pyramid of biomass in a pond ecosystem
Option D
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MEDIUM
ENGLISH
Agriculture
Mr. X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying:
A
First trophic level
Option A
B
Second trophic level
Option B
C
Third trophic level
Option C
D
Fourth trophic level
Option D
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MEDIUM
ENGLISH
Agriculture
The gross production minus losses in an ecosystem is indicated as:
A
Net production
Option A
B
Secondary production
Option B
C
Net storage
Option C
D
Net primary production
Option D
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MEDIUM
ENGLISH
Agriculture
In a forest ecosystem, the numerical relationship between the producers and herbivores:
A
Producers more than herbivores
Option A
B
Producers equal to herbivores
Option B
C
Producers less than herbivores
Option C
D
Variable
Option D
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MEDIUM
ENGLISH
Agriculture
In a sugarcane field the net productivity in terms of kg/m2/year, is:
A
0.2-0.4
Option A
B
2?4
Option B
C
4?6
Option C
D
0.6-0.8
Option D
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MEDIUM
ENGLISH
Agriculture
According to Lindemann, the percentage of net production passed on to carnivores is:
A
28.6
Option A
B
26.8
Option B
C
22.6
Option C
D
22.8
Option D
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MEDIUM
ENGLISH
Agriculture
The rate of storage at consumer level is:
A
Secondary productivity
Option A
B
Tertiary productivity
Option B
C
Both (a) & (b)
Option C
D
Net productivity
Option D
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MEDIUM
ENGLISH
Agriculture
The percentage of water bound in lithosphere and sedimentary rocks is:
A
75
Option A
B
65
Option B
C
85
Option C
D
95
Option D
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MEDIUM
ENGLISH
Agriculture
Sulphur is returned to the soil by:
A
Producers only
Option A
B
Producers and consumers
Option B
C
Consumers and decomposers
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Agriculture
Which ecological cycle is directly driven by sunlight?
A
Hydrologic
Option A
B
Phosphorus
Option B
C
Nitrogen
Option C
D
Sulphur
Option D
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MEDIUM
ENGLISH
Agriculture
Mark the correct statement with reference to phosphorous cycle:
A
Inorganic phosphates are lost by leaching
Option A
B
Ocean phosphates are lost by sedimentation
Option B
C
Soluble phosphates are lost by erosion
Option C
D
Soil has plenty of dissolved phosphates
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following serves as source of carbon in plants:
A
CO2 of carbonic rocks
Option A
B
Atmospheric CO2
Option B
C
Fossil fuel
Option C
D
All of the above
Option D
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