Ozone layer is found in
Thermosphere
Stratosphere
Lithosphere
Mesosphere
A logical sequence of carbon cycle is
Producer-Consumer-Decomposer
Decomposer-Producer-Decomposer
Consumer-Producer-Consumer
Producer-Decomposer-Consumer
Source of energy in the biosphere is
Producer
Decomposer
Sunlight
Heat of earth
A green house gas is
H2
CO
CO2
N2
Agents which make free atmospheric nitrogen available to plants are
Lightning
Free living nitrogen fixing bacteria
Symbiotic nitrogen fixing bacteria
All the above
Green-house gases are
Absorbers of long-wave radiations from earth
Transparent to both solar radiations and long-wave radiations from earth
Absorbers of solar radiations for warming the atmosphere of earth
Transparent to emissions from earth for passage into outer space
Rise of atmospheric temperature because of high concentration of carbon dioxide is known as
Green house effect
Biomagnification
Pollution
Ectone
Climate of the world is threatened by
Increasing concentration of atmospheric oxygen
Decreasing concentration of atmospheric oxygen
Increasing amount of atmospheric carbon dioxide
Decreasing amount of atmospheric carbon dioxide
Nitrogen content of biosphere remains constant due to
Nitrogen fixation
Nitrogen cycle
Industrial pollution
Absorption of nitrogen
Earth is an
Open system
Closed system
Both open and closed system
Neither A and B
