Component of biosphere related with soil is
Lithosphere
Hydrosphere
Atmosphere
None of the above
Ozone layer is found in
Thermosphere
Stratosphere
Mesosphere
A logical sequence of carbon cycle is
Producer-Consumer-Decomposer
Decomposer-Producer-Decomposer
Consumer-Producer-Consumer
Producer-Decomposer-Consumer
Earth is an
Open system
Closed system
Both open and closed system
Neither A and B
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
Source of energy in the biosphere is
Producer
Decomposer
Sunlight
Heat of earth
Phenomenon of rain,dew,snow i.e., different forms of water coming to earth under force of gravity is called as
Geotropism
Climate factors
Precipitation
Calcification
Maintenance of soil fertility without addition of nutrition is due to
Floods
Crop residue
Favourable temperature
Microbial activity
Biogeochemical cycles are also known as
Sedimentary cycles
Gaseous cycles
Material cycling
Cyycles of water
Amount of carbon fixed annually through photosynthesis is
4.6 Χ 1010 kg
7 Χ 1013 kg
7 Χ 1020 kg
4.6 Χ 1021 kg
