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MEDIUM
ENGLISH
Agriculture
Under which system mature trees are scattered over the whole area of the forest and felling should proceed annually over the whole area of the estate?
A
Selection system
Option A
B
Irregular Shelterwood system
Option B
C
Uniform system
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
Deodar normally found in:
A
Seashore of Karachi
Option A
B
In the Hills of Punjab
Option B
C
Plains of Punjab
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
________ is merely a modification of the uniform system where large quantities of advance growth of various ages and size even up to trees of 40 cm diameter are retained as part of the future crop:
A
Irregular Shelterwood system
Option A
B
Coppice system
Option B
C
Both (a) & (b)
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
In which of the following there is no difference?
A
Primary carnivore and trophic level II
Option A
B
Secondary consumers and herbivores
Option B
C
Primary consumers and herbivores
Option C
D
Trophic level I and herbivores
Option D
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MEDIUM
ENGLISH
Agriculture
In desert grasslands, which type of animals are relatively more abundant?
A
Diurnal
Option A
B
Arboreal
Option B
C
Aquatic
Option C
D
Fossorial
Option D
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MEDIUM
ENGLISH
Agriculture
The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:
A
Net primary productivity
Option A
B
Gross secondary productivity
Option B
C
Net secondary productivity
Option C
D
Gross primary productivity
Option D
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MEDIUM
ENGLISH
Agriculture
In a biotic community, primary consumers are:
A
Herbivores
Option A
B
Detrivores
Option B
C
Carnivores
Option C
D
Omnivores
Option D
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MEDIUM
ENGLISH
Agriculture
In an ecosystem, bacteria are considered as:
A
Microconsumers
Option A
B
Secondary consumers
Option B
C
Primary consumers
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
Biological equilibrium is found among the:
A
Producers and consumers
Option A
B
Producers and decomposers
Option B
C
Producers, consumers and decomposers
Option C
D
Producers and light
Option D
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MEDIUM
ENGLISH
Agriculture
The number of individuals of a species in a particular ecosystem at a given constant due to:
A
Man
Option A
B
Parasites
Option B
C
Predators
Option C
D
Available food
Option D
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MEDIUM
ENGLISH
Agriculture
Which is the most stable ecosystem?
A
Desert
Option A
B
Ocean
Option B
C
Mountain
Option C
D
Forest
Option D
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MEDIUM
ENGLISH
Agriculture
The pyramid of number around a tree would be:
A
Straight
Option A
B
Horizontal
Option B
C
Inverted
Option C
D
Indefinite
Option D
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MEDIUM
ENGLISH
Agriculture
The living organisms of all ecosystems collectively constitute:
A
Producers
Option A
B
Decomposers
Option B
C
Consumers and decomposers
Option C
D
Biosphere
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following ecosystem has highest gross primary productivity:
A
Grassland
Option A
B
Coral reefs
Option B
C
Mangroves
Option C
D
Rain forest
Option D
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MEDIUM
ENGLISH
Agriculture
To eat and being eaten relationship is called:
A
Food chain
Option A
B
Food web
Option B
C
Symbiosis
Option C
D
Phagocytosis
Option D
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MEDIUM
ENGLISH
Agriculture
In natural ecosystem, decomposers include:
A
Only two types of organisms
Option A
B
Only two types of organisms plus macroscopic animals
Option B
C
Only microscopic animals
Option C
D
Only bacteria and fungi
Option D
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MEDIUM
ENGLISH
Agriculture
Ecosystem contains:
A
Producers
Option A
B
Consumers
Option B
C
Decomposers
Option C
D
All of the above
Option D
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MEDIUM
ENGLISH
Agriculture
In an ecosystem in abiotic components which of the following occurs?
A
Flow of energy
Option A
B
Cycling of material
Option B
C
Consumption of materials
Option C
D
Flow of energy and cycling of materials
Option D
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MEDIUM
ENGLISH
Agriculture
The main role of bacteria in the carbon cycle involves:
A
Photosynthesis
Option A
B
Assimilation of nitrogenous compounds
Option B
C
Chemosynthesis
Option C
D
Digestion or breakdown of organic compounds
Option D
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MEDIUM
ENGLISH
Agriculture
In a terrestrial ecosystem such as forest maximum energy lies in which trophic level?
A
T1
Option A
B
T2
Option B
C
T3
Option C
D
T4
Option D
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