Energy enters into the ecosystem through:

Related Mcqs:

1. The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:

   A. Net primary productivity
   B. Gross secondary productivity
   C. Net secondary productivity
   D. Gross primary productivity

2. 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

3. 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

4. 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

5. The flow of materials and energy in an ecosystem is respectively:

   A. Cyclic only
   B. Cyclic and linear
   C. Linear and cyclic
   D. Linear only

6. In a terrestrial ecosystem such as forest maximum energy lies in which trophic level?

   A. T1
   B. T2
   C. T3
   D. T4

7. Source of energy in an ecosystem is:

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

8. The ultimate energy source of ecosystem is:

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

9. Energy flow and energy transformations in living systems strictly conform to the:

   A. Law of limiting factors
   B. Liebig’s law of minimum
   C. Laws of thermo dynamics
   D. Shelford’s law of tolerance
   E. Biogenetic law

10. The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:

    A. 25%
    B. 50%
    C. 10%
    D. 5%