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MEDIUM
ENGLISH
Agriculture
The primary succession refers to the development of communities on a:
A
Freshly cleared crop field
Option A
B
Forest clearing after devastating fire
Option B
C
Pons, freshly filled water after a dry phase
Option C
D
Newly-exposed habitat with no record of earlier vegetation
Option D
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MEDIUM
ENGLISH
Agriculture
In an aqueous environment, the microscopic animals are collectively called:
A
Herbivores
Option A
B
Carnivores
Option B
C
Planktons
Option C
D
Fauna and flora
Option D
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MEDIUM
ENGLISH
Agriculture
The last stage of plant succession is:
A
Ecotone
Option A
B
Climax stage
Option B
C
Seral community
Option C
D
Ecotype
Option D
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MEDIUM
ENGLISH
Agriculture
Which one is called amphibious plant?
A
Polygonum
Option A
B
Casuarina
Option B
C
Wolffia
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Agriculture
During ecological succession from pioneers to climax community the biomass of vegetation:
A
Increases, then decreases
Option A
B
Remains constant
Option B
C
Decreases continuously
Option C
D
Increases continuously
Option D
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MEDIUM
ENGLISH
Agriculture
The nature of a climax community depends upon:
A
Water factor
Option A
B
Temperature
Option B
C
Soil fertility
Option C
D
Climate
Option D
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MEDIUM
ENGLISH
Agriculture
A succession exhibiting changes in the communities at a place is described as:
A
Biotic succession
Option A
B
Physiographic succession
Option B
C
Climatic succession
Option C
D
Geographic succession
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following is not a primary coloniser?
A
Blue-green algae
Option A
B
Viruses
Option B
C
Lichens
Option C
D
Mosses
Option D
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MEDIUM
ENGLISH
Agriculture
The community which begins succession in a habitat is designated as:
A
Seral community
Option A
B
Biotic community
Option B
C
Pioneer community
Option C
D
Ecosere
Option D
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MEDIUM
ENGLISH
Agriculture
Which part of the world has a high density of organism?
A
Greenlands
Option A
B
Savannahas
Option B
C
Deciduous forests
Option C
D
Tropical rain forest
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following communities is more vulnerable to invasion by outside animals and plants?
A
Mangroves
Option A
B
Tropical evergreen forests
Option B
C
Temperate forests
Option C
D
Oceanic island communities
Option D
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MEDIUM
ENGLISH
Agriculture
The sequence: blue green algae – crustose lichen – foliose lichen – mosses – shrubs – dicot trees represent
A
Genetic drift
Option A
B
Ecological succession trend
Option B
C
A food pyramid
Option C
D
A phylogenetic trend
Option D
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MEDIUM
ENGLISH
Agriculture
The nature of climax community ultimately depends upon:
A
Climate
Option A
B
Soil organism
Option B
C
Bed rock
Option C
D
Pool of available nutrients
Option D
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MEDIUM
ENGLISH
Agriculture
Primary succession refers to the development of communities on a:
A
Pond freshly filled with water after a dry phase
Option A
B
Freshly cleared crop fields
Option B
C
Newly exposed habitat with no record of earlier vegetation
Option C
D
Forest clearing after devastating free
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following is a piopcer in a lithosere?
A
Hypnuma
Option A
B
Parmelia
Option B
C
Lecanora
Option C
D
Barbula
Option D
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MEDIUM
ENGLISH
Agriculture
The woodland stage in a hydrosphere has predominance of plants like:
A
Eleocharis, Fimbristylis
Option A
B
Salix, Populus
Option B
C
Ranunculus, Polygonum
Option C
D
Acer, Ulmus
Option D
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MEDIUM
ENGLISH
Agriculture
The biotic factor not involved in the succession:
A
Human beings
Option A
B
Non-pathogenic microbes
Option B
C
Pathogenic microbes
Option C
D
Grazing animals
Option D
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MEDIUM
ENGLISH
Agriculture
In a hydrosere, the submered stage is followed by:
A
Phytoplanktons
Option A
B
Reed-swamps
Option B
C
Sedges
Option C
D
Floating plants
Option D
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MEDIUM
ENGLISH
Agriculture
Mark the pioneer in a hydrosphere:
A
Diatoms
Option A
B
Najas
Option B
C
Zanichellia
Option C
D
Lemna
Option D
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MEDIUM
ENGLISH
Agriculture
When the process of succession sidetracks the advancement line, it is called:
A
Primary
Option A
B
Deflated
Option B
C
Secondary
Option C
D
Induced
Option D
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