Every ecosystem must have a continuous external source of:

Related Mcqs:

1. In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:

   A. Primary and secondary consumers are similar
   B. Both biotic and abiotic components are different
   C. The biotic components are almost similar
   D. The abiotic components are almost similar

2. Exotic species, which brought for plantation from some other country to our country or even from one ecosystem to other ecosystem are called, as exotic species like:

   A. Pinus nigra – Japan
   B. Euralyptus – Australia
   C. Polunia – China
   D. All of the above

3. The source of energy in an ecosystem is:

   A. sugar stored in plants
   B. Light received from the sun
   C. Heat liberated during fermentation
   D. Heat liberated during respiration

4. Source of energy in an ecosystem is:

   A. Sun
   B. ATP
   C. Sugar made by plant
   D. Green plant

5. The ultimate energy source of ecosystem is:

   A. Solar energy
   B. Biomass
   C. Producer
   D. Carbohydrates

6. Increment by continuous forest inventory (CFI) means:

   A. Used in USA and Canada
   B. Large area under first, they can’t adopt other method
   C. Sometime metallic rod is fixed in centre
   D. Measured after 5 or 10 years
   E. All of the above

7. The two major functional components of an ecosystem are:

   A. Energy flow and food chain
   B. Mineral recycling and energy flow
   C. Food chain and decomposers
   D. Energy flow and decomposers

8. Ecosystem creates:

   A. Food chains
   B. Food web
   C. Both (a) & (b)
   D. None of the above

9. An ecosystem is a structure that is:

   A. Always temporary
   B. Always permanent
   C. Either of these
   D. Rarely permanent

10. Which is the most stable ecosystem?

    A. Mountain
    B. Desert
    C. Forest
    D. Ocean