The part of earth in which life exists is known as:

Related Mcqs:

1. The part of earth in which life exists is known as:

   A. Lithosphere
   B. Biosphere
   C. Atmosphere
   D. Hydrosphere

2. The term biosphere is used for the zone of earth where life exists:

   A. On the lithosphere surface
   B. In the hydrosphere
   C. In the lithosphere, hydrosphere and atmosphere
   D. In the lithosphere and hydrosphere

3. If there were no CO2 in the earth’s atmosphere, the temperature of earth’s surface would have been:

   A. same as present
   B. Less than the present
   C. Higher than the present
   D. Dependent on the amount of O2 in the atmosphere

4. Geology is the study of earth. Earth’s crust is divided into:

   A. Ocean
   B. Continents
   C. Both (a) & (b)
   D. None of these

5. The ecosystem exists in a state of ‘balance’. Supposing one of the heterotrophs, says the rabbit, multiplies and increases in number suddenly then:

   A. The balance will be permanently upset because the rabbits will eat the grass in the system and die of starvation
   B. The ‘balance’ will be restored by an increase in the wolf population
   C. Epidemics will break out in the rabbits and kill all of them
   D. Rabbits will starts eating each other

6. The earth could have sustained more population if all the people would have been:

   A. Pure vegetarians
   B. Milk drinker and vegetarian
   C. Non-vegetarians
   D. Dependent upon milk, egg and vegetarian habit

7. If all the green plants were to disappear from the earth:

   A. Only the herbivores will die
   B. All the animal will die
   C. Only the carnivores will die
   D. It will not matter to anyone because chemosynthetic bacteria will produce food for all

8. The processes involving the transformation of carbon compounds on earth include:

   A. Only the plants
   B. Both biological and non-biological processes
   C. Only the living organisms
   D. Only the animals

9. The earth’s atmosphere in which organisms live, is called:

   A. Ecosystem
   B. Ectosome
   C. Biosphere
   D. Bioeconomic

10. All the living organisms on the earth interacting with atmosphere constitute:

    A. Biosphere
    B. Community
    C. Biome
    D. Association