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MEDIUM
ENGLISH
Agriculture
Plants growing in xerophytic conditions usually have:
A
Feebly developed root system
Option A
B
Deep and much branched root system
Option B
C
Well developed leaves
Option C
D
III developed vascular system
Option D
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MEDIUM
ENGLISH
Agriculture
Rhododendron is characteristic of vegetation of:
A
Tropical zone
Option A
B
Gangetic plains
Option B
C
Mangrove belt
Option C
D
Alpine zone
Option D
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MEDIUM
ENGLISH
Agriculture
Rhododendron is most prominent at an altitude of:
A
Above 9,000
Option A
B
At 6,000
Option B
C
6,000-9,000
Option C
D
At sea level
Option D
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MEDIUM
ENGLISH
Agriculture
If less light falls on a pond surface:
A
The size of fishes becomes large
Option A
B
The size of fish population becomes smaller
Option B
C
The size of fish population is in no way connected with the amount of light falling on a pond
Option C
D
Mutation will take place in fishes
Option D
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MEDIUM
ENGLISH
Agriculture
Tropical dense forest is due to:
A
Low temperature and excess rain
Option A
B
High temperature and excess rain
Option B
C
High temperature and lesser rain
Option C
D
Wild animals (tigers, lions, bears etc.)
Option D
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MEDIUM
ENGLISH
Agriculture
Which one of the following pairs is mismatched?
A
Savanna – Acacia trees
Option A
B
Prairie – Epiphytes
Option B
C
Coniferous forest – Evergreen trees
Option C
D
Tundra – Permafrost
Option D
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MEDIUM
ENGLISH
Agriculture
Broad leaved deciduous forests are typical of:
A
Monsoon region
Option A
B
Mid-latitude forests
Option B
C
Mediterranean region
Option C
D
Coniferous forests
Option D
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MEDIUM
ENGLISH
Agriculture
Alpine forests occur at an altitude:
A
3,900-6,000 m
Option A
B
1,900-3,000 m
Option B
C
1,000-1,5000 m
Option C
D
500-1,000 m
Option D
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MEDIUM
ENGLISH
Agriculture
Mucilagenous tissue and chlorenchymatous cortex are characteristic of:
A
Epiphytes
Option A
B
Insectivorous plants
Option B
C
Halophytes
Option C
D
Mesophytes
Option D
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MEDIUM
ENGLISH
Agriculture
The plant that has a characteristic component of the mangrove vegetation is:
A
Rhizophora mangle
Option A
B
Ficus religiosa
Option B
C
Mangifera indica
Option C
D
Prosopis specigera
Option D
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MEDIUM
ENGLISH
Agriculture
Plants are killed in winter by frost:
A
Because there is no transpiration
Option A
B
Because respiration ceases at such a low temperature
Option B
C
Because no photosynthesis takes place at such a low temperature
Option C
D
Because of desiccation and mechanical damage to the tissues
Option D
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MEDIUM
ENGLISH
Agriculture
Plants growing near sea shore will usually have xerophytic characters, like thick leaves, because:
A
There is plenty of water in the soil
Option A
B
There is too high a concentration of salts for the plants to absorb sufficient water from the soil
Option B
C
Light available to plant is not sufficient
Option C
D
The soil is muddy
Option D
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MEDIUM
ENGLISH
Agriculture
The stems of submerged water plant are soft and weak because:
A
They are absolutely devoid of xylem
Option A
B
They totally lack phloem
Option B
C
They do not have stomata
Option C
D
The supporting tissues and xylem are feebly developed
Option D
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MEDIUM
ENGLISH
Agriculture
Deserts plants have longer root system because:
A
High temperature of soil encourages root growth
Option A
B
Low temperature at night encourages root growth
Option B
C
Those plants adapted to produce long system can survive better in desert
Option C
D
Roots grow in search of water
Option D
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MEDIUM
ENGLISH
Agriculture
Percentage of water left in the soil when a plant wilts is known as:
A
Turgidity
Option A
B
Wilting coefficient
Option B
C
Field capacity
Option C
D
Water retaining power of the soil
Option D
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MEDIUM
ENGLISH
Agriculture
Plants absorb from the soil:
A
Hygroscopic water
Option A
B
Gravitational water
Option B
C
Capillary water
Option C
D
Hygroscopic and gravitational water
Option D
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MEDIUM
ENGLISH
Agriculture
Desert plants are generally:
A
Succulents
Option A
B
Heterophyllous
Option B
C
Herbaceous
Option C
D
Viviparous
Option D
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MEDIUM
ENGLISH
Agriculture
Hydrophytes usually have:
A
Well developed stomata
Option A
B
Well developed aerenchyma
Option B
C
Well developed root system
Option C
D
Well developed vascular system
Option D
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MEDIUM
ENGLISH
Agriculture
Field capacity is the extent to which a soil can hold:
A
Gravitational water
Option A
B
Capillary water
Option B
C
Hygroscopic water
Option C
D
Capillary water plus hygroscopic water
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following are plants of one group?
A
Mangifera and Rhizophora
Option A
B
Rhizophora and Avicennia
Option B
C
Rhizophora and Balanophora
Option C
D
Avicennia and Balanophora
Option D
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