Ecosystem(Patterns, Components; Productivity and Decomposition; Energy Flow; Pyramids of Number, Biomass, Energy) NEET Questions

Biology - Ecology and Environment

Ecosystem(Patterns, Components; Productivity and Decomposition; Energy Flow; Pyramids of Number, Biomass, Energy) MCQ Questions


13.
Productivity in an ecosystem refers to:
A.
Total energy stored in soil
B.
The amount of decomposition
C.
The total number of species
D.
The rate of biomass production
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ANSWER :
D. The rate of biomass production
14.
Primary productivity is defined as:
A.
The biomass produced by herbivores
B.
The biomass produced by carnivores
C.
The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis
D.
The total biomass of decomposers
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ANSWER :
C. The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis
15.
The unit for primary productivity expressed as energy is:
A.
kg ha⁻¹
B.
g m⁻² yr⁻¹
C.
ml/L
D.
kcal m⁻² yr⁻¹
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ANSWER :
D. kcal m⁻² yr⁻¹
16.
Gross Primary Productivity (GPP) is:
A.
Total biomass of an ecosystem
B.
GPP minus respiration losses
C.
Net biomass available to herbivores
D.
Rate of production of organic matter during photosynthesis
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ANSWER :
D. Rate of production of organic matter during photosynthesis
17.
Net Primary Productivity (NPP) is calculated as:
A.
GPP + Respiration
B.
GPP / Biomass
C.
GPP × Respiration
D.
GPP - Respiration losses (R)
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ANSWER :
D. GPP - Respiration losses (R)
18.
Net Primary Productivity (NPP) represents:
A.
Total energy fixed by producers
B.
Available biomass for consumption by herbivores and decomposers
C.
Energy lost as heat
D.
Energy lost in respiration
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ANSWER :
B. Available biomass for consumption by herbivores and decomposers