Q26
Allen
(Conceptual Questions)
MCQ
The Pyramid of numbers in grassland ecosystem will be :-
A.
Upright
B.
Inverted
C.
Irregular
D.
Linear
Q27
Allen
(Conceptual Questions)
MCQ
Which ecosystem has maximum number of producers in an unit area?
A.
Pond
B.
Grassland
C.
Forest
D.
Tundra
Q28
Allen
(Conceptual Questions)
MCQ
The storage of energy at consumer level is known as :-
A.
Gross primary production
B.
Secondary productivity
C.
Net primary productivity
D.
Net productivity
Q29
Allen
(Conceptual Questions)
MCQ
Gross primary productivity is :-
A.
Rate at which organic molecules are formed in an autotroph
B.
Rate at which organic molecules are used up by an autotroph
C.
Storage of organic molecules in the body of an autotroph
D.
Rate at which organic molecules are transferred to next higher trophic level
Q30
Allen
(Conceptual Questions)
MCQ
Carbon cycle includes (the following is a logical sequence) :-
A.
Producer ā consumer ā decomposer
B.
Decomposer ā consumer ā producer
C.
Producer ā decomposer ā consumer
D.
Consumer ā producer ā decomposer
Q31
Allen
(Conceptual Questions)
MCQ
The flow of materials from non-living components to living components and back to the non-living components in a more or less cyclic manner is called a :-
A.
Gaseous cycle
B.
Sedimentary cycle
C.
Biogeochemical cycle
D.
Hydrologic cycle
Q32
Allen
(Conceptual Questions)
MCQ
A group of interconnected food chains is called:
A.
Pyramid of energy
B.
Food web
C.
Food cycle
D.
Complex food chain
Q33
Allen
(Conceptual Questions)
MCQ
Which of these is the food chain which runs from larger to smaller organisms?
A.
Grazing food chain
B.
Saprotrophic food chain
C.
Predatory food chain
D.
Parasitic food chain
Q34
Allen
(Conceptual Questions)
MCQ
A food chain starts from: -
A.
Nitrogen fixing organisms
B.
Photosynthetic organisms
C.
Respiration
D.
Decomposers
Q35
Allen
(Conceptual Questions)
MCQ
The functional unit of nature is called: -
A.
Community
B.
Ecosystem
C.
Population
D.
Succession
Q36
Allen
(Conceptual Questions)
MCQ
Primary productivity of plants in an ecosystem depends on :-
A.
A variety of environmental factors
B.
Availability of nutrients
C.
Photosynthetic capacity of plants
D.
All of the above
Q37
Allen
(Conceptual Questions)
MCQ
The annual net primary productivity of land is about :-
A.
170 billion tons
B.
70 billion tons
C.
55 billion tons
D.
115 billion tons
Q38
Allen
(Conceptual Questions)
MCQ
Which of the following is included in decomposition?
A.
Fragmentation
B.
Leaching
C.
Catabolism
D.
All of the above
Q39
Allen
(Conceptual Questions)
MCQ
Decomposition rate is slow if detritus is rich in :-
A.
Nitrogen
B.
Humus
C.
Sugars
D.
Lignin and Chitin
Q40
Allen
(Conceptual Questions)
Match the Columns
Match the Column-I, II and Column-III, and choose the correct combination from the options given :-
Column-III
(a) 1Ā° Producer
(b) 1Ā° Consumer
(c) 2Ā° Consumer
(d) 3Ā° Consumer
Column-III
(a) 1Ā° Producer
(b) 1Ā° Consumer
(c) 2Ā° Consumer
(d) 3Ā° Consumer
A.
Tā
B.
Tā
C.
Tā
D.
Tā
(p) Grasshopper
(q) Wolf
(r) Lion
(s)Phytoplankton
Q41
Allen
(Conceptual Questions)
MCQ
A plant receives $10^{6}$ J of sunlight energy. The energy reached at the tertiary consumer will be: -
A.
1000 J
B.
100 J
C.
10 J
D.
1 J
Q42
Allen
(Conceptual Questions)
MCQ
An inverted pyramid of biomass can be found in which ecosystem: -
A.
Forest
B.
Pond
C.
Grass land
D.
Tundra
Q43
Allen
(Conceptual Questions)
MCQ
In an ecosystem:
A.
Primary producers are more than primary consumers
B.
Primary consumers are larger than primary producers
C.
Secondary consumers are larger than primary producers
D.
Primary consumers are least depend on primary producers
Q44
Allen
(Conceptual Questions)
MCQ
Large ecosystems are called -
A.
Biomes
B.
Ecotone
C.
Ecads
D.
Biocoenosis
Q45
Allen
(Conceptual Questions)
MCQ
Which one is not a functional aspect of ecosystem?
A.
Energy flow
B.
Productivity
C.
Decomposition
D.
Stratification
Q46
Allen
(Conceptual Questions)
MCQ
Vultures in an ecosystem are :
A.
Predators
B.
Scavangers
C.
Consumers
D.
Top carnivores
Q47
Allen
(Conceptual Questions)
MCQ
The maximum energy is stored at which of the following trophic level in any ecosystem
A.
Producers
B.
Herbivores
C.
Carnivores
D.
Top carnivores
Q48
Allen
(Conceptual Questions)
MCQ
Limiting factor for productivity in lake is :-
A.
Phosphorous
B.
Nitrogen
C.
Carbon
D.
Sulphur
Q49
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
Q50
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