Question

The term biosphere is used for the zone of Earth, where life exists
A. On the lithosphere
B. In the hydrosphere
C. In the lithosphere and hydrosphere
D. In the lithosphere, hydrosphere and atmosphere

Answer 1

Hint:
 ‘The term biosphere is used for the zone of Earth, where life exists’, this statement refers to the part of earth where all the living organisms which includes human, animals, plants, single celled organisms and all other types of living creature are inhabited. It is the only region of the earth where life can exist.

Complete answer:
Biosphere is called the life zone of the earth because it has all the essentialities needed for the existence of a life, where air is needed for breathing process, water is needed for drinking and existence of plants and land is needed for living, Here we can see that in biosphere we have water to drink which comes under hydrosphere, air for breathing which comes under atmosphere and land for living on which comes under lithosphere, so biosphere is the region which has all these three essentialities for the survival of an organisms. Life is found in every part of the biosphere including water, soil, air and what not all are life supporting mediums. We can find a wide variety of plants in the soil, variety of aquatic animals and organisms in the water and approx. limitless life forms on the land.

Thus the correct answer for the above mentioned question is (D) In the lithosphere, hydrosphere and atmosphere.

Note: The word ‘Biosphere’ was discovered by the well known geologist ‘Eduard Suess’ in around 1875, he told that biosphere is the region of earth where life dwells. It can be defined as the total sum of living organisms that includes biomass as well as biota in it.