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MEDIUM
ENGLISH
Agriculture
The ultimate seral community appears in an area as a result of:
A
Reaction
Option A
B
Nudation
Option B
C
Invasion
Option C
D
Ecesis
Option D
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MEDIUM
ENGLISH
Agriculture
The effect of individuals of the same species upon each other is called:
A
Reaction
Option A
B
Competition
Option B
C
Coaction
Option C
D
Ecesis
Option D
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MEDIUM
ENGLISH
Agriculture
Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:
A
Induced
Option A
B
Deflated
Option B
C
Allogenic
Option C
D
Autogenic
Option D
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MEDIUM
ENGLISH
Agriculture
Mark the climatic cause for the initiation of succession:
A
Erosion
Option A
B
Drought
Option B
C
Deposition
Option C
D
Micro-organisms
Option D
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MEDIUM
ENGLISH
Agriculture
The direction of succession is:
A
Predictable
Option A
B
Unpredictable
Option B
C
Hephazard
Option C
D
Always changing
Option D
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MEDIUM
ENGLISH
Agriculture
Mark the correct sequence of events occurring during ecological succession:
A
Nudation – ecesis – aggregation – migration
Option A
B
Migartion – ecesis – aggregation – nudation
Option B
C
Nudation – migration – ecesis – aggregation
Option C
D
Nudation – ecesis – migration – aggregation
Option D
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MEDIUM
ENGLISH
Agriculture
In a hydrosphere the plants like Carex, Cyperus, and Juncus appear just after a community comprising:
A
Lemna, Wolffia, Spirodela
Option A
B
Nuphar, Nelumbo, Victoria
Option B
C
Scirpus, Typha, Sagittaria
Option C
D
Najas, Ceratophyllum, Elodea
Option D
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MEDIUM
ENGLISH
Agriculture
The ecological succession occurring as population 1 ? 2 ? 3 ? 4 indicates
A
Cyclic succession
Option A
B
Induced succession
Option B
C
Retrogressive succession
Option C
D
Allogenic succession
Option D
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MEDIUM
ENGLISH
Agriculture
According to polyclimax hypothesis, the climax stage is controlled by:
A
Edaphic factors
Option A
B
Biotic factors
Option B
C
Topographic factors
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Agriculture
When the substratum has ample of organic matter and there are many deterivore participating in the process, the succession is called:
A
Allogenic
Option A
B
Retrogressive
Option B
C
Heterotrophic
Option C
D
Induced
Option D
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MEDIUM
ENGLISH
Agriculture
The invasion of a new community in a bare area is initiated by:
A
Migration
Option A
B
Ecesis
Option B
C
Aggregation
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Agriculture
The term succession was coined by:
A
Tansley
Option A
B
Hult
Option B
C
Hodges
Option C
D
Kormondy
Option D
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MEDIUM
ENGLISH
Agriculture
The ecological succession was first studied by:
A
Clements
Option A
B
Hult
Option B
C
Odum
Option C
D
King
Option D
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MEDIUM
ENGLISH
Agriculture
The invasion of a community in succession involves:
A
Ecesis, aggregation and competition
Option A
B
Migration, aggregation and competition
Option B
C
Aggregation, competition and coaction
Option C
D
Migration, ecesis and aggregation
Option D
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MEDIUM
ENGLISH
Agriculture
The physiographic factor responsible for the initiation of succession to:
A
Erosion
Option A
B
Fire
Option B
C
Hail
Option C
D
Wind
Option D
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MEDIUM
ENGLISH
Agriculture
If a piece of land which had a plant community becomes barren due to some external thrust, the succession taking place here is called:
A
Induced
Option A
B
Deflated
Option B
C
Secondary
Option C
D
Retrogessive
Option D
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MEDIUM
ENGLISH
Agriculture
The climax vegetation in a lithosere of temperate zone is dominated by plants like:
A
Boswellia
Option A
B
Balanites
Option B
C
Anogeissus
Option C
D
Quercus
Option D
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MEDIUM
ENGLISH
Agriculture
Plant succession taking place in sandy area is precisely called:
A
Halosphere
Option A
B
Psammosphere
Option B
C
Xerosphere
Option C
D
Hydrosphere
Option D
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MEDIUM
ENGLISH
Agriculture
The herb stage in a lithosphere has predominance of plants like
A
Rhus
Option A
B
Weissia
Option B
C
Poa
Option C
D
Capparis
Option D
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MEDIUM
ENGLISH
Agriculture
Many forested regions of today were once barren rock areas. Mot likely this change involved the following sequence of stages:
A
Lichens-mosses-annual herbs-wood shrubs
Option A
B
Annual herb-weedy shrubs-lichens-mosses
Option B
C
Woody shrubs-mosses-lichens-annual herbs
Option C
D
Mosses-annual herbs-woody shrubs-lichens
Option D
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