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The upright pyramid of number is absent in
Secondary productivity is rate of formation of new organic matter by
Which one of the following is not a functional unit of an ecosystem?
The biomass available for consumption by the herbivores and the decomposers is called
Net primary productivity
Gross primary productivity
Which one of the following statement for pyramid of energy is incorrect whereas the remaining three are correct?
It show energy content of different trophic level of organisms.
It is inverted in shape.
It is upright in shape.
Its base is broad.
Identify the possible link 'B' in the following food chain:
Plant Insect 'B' Eagle
Natural reservoir of phophorus is
Of the total incident solar radiation the proportion of PAR is
Which one of the following pair is mismatached?
Biomass burning - Release of CO2
Fossil fuel burning - Release of CO2
Nuclear power - Radioactive waste
Solar energy - Green house effect
Which one of the following is not used for constructing of ecological pyramids?
Number of individuals
Rate of energy flow
The maximum bio magnification would be in which of the following in case of aquatic ecosystem?
Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?
Less than 1%
During the process of ecological succession the changes that take place in communities are
Orderly and sequential
Not influenced by the physical environment
The sequence of communities of primary succession in water is
Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees
Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses and trees
Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses and trees
Phytoplankton, rooted submerged hydrophytes, floating
The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called
Which of the following is NOT a denitrifying bacteria
Ecosystem is smallest unit of
Succulent plant grows in
Tropical rain forests
Temperate deciduous forests
The nature's cleaner are
Decomposers and scavengers
Trophic level in ecosystem is formed by
organisms linked in food chain