The reason for green house effect is
Higher CO2 concentration causing global warming
Absorption of infra-red rays by gases and dust particles
Both A and B
Refraction of CO2
A green house gas is
H2
CO
CO2
N2
Earth is an
Open system
Closed system
Both open and closed system
Neither A and B
Process of evapo-transpiration and precipitation is called
Carbon cycle
Nitrogen cycle
Hydrological cycle
All the above
Maintenance of soil fertility without addition of nutrition is due to
Floods
Crop residue
Favourable temperature
Microbial activity
Source of energy in the biosphere is
Producer
Decomposer
Sunlight
Heat of earth
Biogeochemical cycles are also known as
Sedimentary cycles
Gaseous cycles
Material cycling
Cyycles of water
Rise of atmospheric temperature because of high concentration of carbon dioxide is known as
Green house effect
Biomagnification
Pollution
Ectone
Component of biosphere related with soil is
Lithosphere
Hydrosphere
Atmosphere
None of the above
Biosphere consists of
