Biosphere consists of
Lithosphere
Atmosphere
Hydrosphere
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
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
Component of biosphere related with soil is
None of the above
In one year, one hectare of forest shall
Consume 10 tonnes of CO2 and evolve 10 tonnes of O2
Consume 20 tonnes of CO2 and evolve 10 tonnes of O2
Consume 30 tonnes of CO2 and evolve 30 tonnes of O2
The combustion of fossil fuels and deforestation have caused the atmospheric concentration of carbon dioxide to increase by about 35% since the beginning of the age of industrialization. Hence consumption of carbon dioxide will increase every year.
Biogeochemical cycles are also known as
Sedimentary cycles
Gaseous cycles
Material cycling
Cyycles of water
Nitrogen content of biosphere remains constant due to
Nitrogen fixation
Nitrogen cycle
Industrial pollution
Absorption of nitrogen
A logical sequence of carbon cycle is
Producer-Consumer-Decomposer
Decomposer-Producer-Decomposer
Consumer-Producer-Consumer
Producer-Decomposer-Consumer
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
Process of evapo-transpiration and precipitation is called
Carbon cycle
Hydrological cycle
