Q51
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)
Q52
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
Q53
Allen
(Conceptual Questions)
MCQ
A pond is a :-
A.
Biome
B.
Natural ecosystem
C.
Artificial ecosystem
D.
Community of plants & animals
Q54
Allen
(Conceptual Questions)
MCQ
Which of the following are not given any place in ecological pyramids ā
A.
Herbivores
B.
Carnivores
C.
Producers
D.
Saprophytes
Q55
Allen
(Conceptual Questions)
MCQ
The bulk of nitrogen in nature is fixed by -
A.
Lighting
B.
Chemical industries
C.
Denitrifying bacteria
D.
Symbiotic bacteria
Q56
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
Q57
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
Q58
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
Q59
Allen
(Conceptual Questions)
MCQ
Forests near equator region are called -
A.
Deciduous
B.
Tropical rain forests
C.
Coniferous forests
D.
Temperate forests
Q60
Allen
(Conceptual Questions)
MCQ
All the living organisms and non-living factors of the earth constitute -
A.
Biosphere
B.
Community
C.
Biome
D.
Association
Q61
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
Q62
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
Q63
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
Q64
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
Q65
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
Q66
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
Q67
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
Q68
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%
Q69
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
Q70
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
Q71
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
Q72
Allen
(Conceptual Questions)
MCQ
Identify the possible link "A" in the following food chain: - Plant ā Insect ā Frog ā "A" ā Eagle
A.
Cobra
B.
Parrot
C.
Rabbit
D.
Wolf
Q73
Allen
(Conceptual Questions)
MCQ
Secondary productivity is rate of formation of new organic matter by :-
A.
Decomposer
B.
Producer
C.
Parasite
D.
Consumer
Q74
Allen
(Conceptual Questions)
MCQ
Which one of the following is functional characteristics of ecosystem?
A.
Stratification
B.
Productivity
C.
Species dominancy
D.
Species diversity
Q75
Allen
(Conceptual Questions)
MCQ
In an ecosystem :-
A.
Primary producers are more than primary consumers.
B.
Primary consumers are always larger than primary producers.
C.
Secondary consumers are always larger than primary producers.
D.
Primary consumers are least depend on primary producers.