Q226
Allen
(Conceptual Questions)
MCQ
Limiting factor for productivity in lake is :-
A.
Phosphorous
B.
Nitrogen
C.
Carbon
D.
Sulphur
Q227
Allen
(Conceptual Questions)
MCQ
In an ecosystem, energy flow is always :-
A.
Bidirectional
B.
Unidirectional
C.
In all directions
D.
More than one option is correct
Q228
Allen
(Conceptual Questions)
MCQ
What is formed when a biological community is integrated with its physical environment?
A.
Biosphere
B.
Biome
C.
Ecosystem
D.
Population
Q229
Allen
(Conceptual Questions)
MCQ
Based on ecology which is not essential for an ecosystem to self-sustain-
A.
Consumers
B.
Producers
C.
Decomposers (1) Both (1) and (2)
Q230
Allen
(Conceptual Questions)
MCQ
Statement-1 : Death of organism is the beginning of the detritus food chain/web.
Statement 2 : Amount of energy decreases at successive trophic levels.
A.
Both statement 1 and 2 are incorrect
B.
Statement 1 is correct but statement 2 is incorrect
C.
Statement 1 is incorrect but statement 2 is correct
D.
Both statement 1 and 2 are correct
Q231
Allen
(Conceptual Questions)
MCQ
A pond is a :-
A.
Biome
B.
Natural ecosystem
C.
Artificial ecosystem
D.
Community of plants & animals
Q232
Allen
(Conceptual Questions)
MCQ
Which of the following are not given any place in ecological pyramids –
A.
Herbivores
B.
Carnivores
C.
Producers
D.
Saprophytes
Q233
Allen
(Conceptual Questions)
MCQ
The bulk of nitrogen in nature is fixed by -
A.
Lighting
B.
Chemical industries
C.
Denitrifying bacteria
D.
Symbiotic bacteria
Q234
Allen
(Conceptual Questions)
MCQ
A good soil is that which -
A.
holds whole of the water entering into it
B.
Allows limited amount of water into it
C.
Allows the water to percolate slowly into it
D.
Allows the water to pass very quickly from it
Q235
Allen
(Conceptual Questions)
MCQ
The soil near the surface is usually darker then the soil about one meter down. This is because the top soil is
A.
Young & wet
B.
Richer in organic matter
C.
Richer in Ca & Mg
D.
Dry
Q236
Allen
(Conceptual Questions)
MCQ
A soil is said to be fertile when -
A.
It is rich in organic matter
B.
It has capacity to hold water
C.
It has a capacity to hold nutrients
D.
It holds water & all essential nutrients in a definite proportion
Q237
Allen
(Conceptual Questions)
MCQ
Forests near equator region are called -
A.
Deciduous
B.
Tropical rain forests
C.
Coniferous forests
D.
Temperate forests
Q238
Allen
(Conceptual Questions)
MCQ
All the living organisms and non-living factors of the earth constitute -
A.
Biosphere
B.
Community
C.
Biome
D.
Association
Q239
Allen
(Conceptual Questions)
MCQ
The term biosphere is used for the zone of the earth where life exists -
A.
On the lithospere
B.
In the hydrosphere
C.
In the lithosphere and hydrosphere
D.
In the lithosphere, hydrosphere and atmosphere
Q240
Allen
(Conceptual Questions)
MCQ
A biosphere is composed of
A.
Living organisms
B.
Living organisms + Lithosphere
C.
Living organisms + lithosphere + atmosphere
D.
Living organisms + lithosphere + atmosphere + hydrosphere
Q241
Allen
(Conceptual Questions)
MCQ
Which one of the following is not used for construction of ecological pyramids?
A.
Rate of energy flow
B.
Fresh weight
C.
Dry weight
D.
Number of individuals
Q242
Allen
(Conceptual Questions)
MCQ
Which one of the following ecosystem types has the highest annual net primary productivity?
A.
Temperate deciduous forest
B.
Tropical rain forest
C.
Tropical deciduous forest
D.
Temperate evergreen forest
Q243
Allen
(Conceptual Questions)
MCQ
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
A.
Frog
B.
Phytoplankton
C.
Fish
D.
Zooplankton
Q244
Allen
(Conceptual Questions)
MCQ
The biomass available for consumption by the herbivores and the decomposers is called :-
A.
Gross primary productivity
B.
Net primary productivity
C.
Secondary productivity
D.
Standing crop
Q245
Allen
(Conceptual Questions)
MCQ
Mass of living matter at a trophic level in an area at any time is called: -
A.
Standing crop
B.
Detritus
C.
Humus
D.
Standing state
Q246
Allen
(Conceptual Questions)
MCQ
Of the total incident solar radiation, the proportion of PAR is: -
A.
About 70%
B.
About 60%
C.
Less than 50%
D.
More than 80%
Q247
Allen
(Conceptual Questions)
MCQ
Which one of the following animals may occupy more than one trophic level in the same ecosystem at the same time?
A.
Frog
B.
Sparrow
C.
Lion
D.
Goat
Q248
Allen
(Conceptual Questions)
MCQ
The breakdown of detritus into smaller particles by earthworm is a process called
A.
Catabolism
B.
Humification
C.
Fragmentation
D.
Mineralisation BES094
Q249
Allen
(Conceptual Questions)
MCQ
Which one of the following is not a functional unit of an ecosystem: -
A.
Productivity
B.
Species diversity
C.
Energy flow
D.
Decomposition
Q250
Allen
(Conceptual Questions)
MCQ
Identify the possible link "A" in the following food chain: - Plant → Insect → Frog → "A" → Eagle
A.
Cobra
B.
Parrot
C.
Rabbit
D.
Wolf