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Botany - Ecosystem Three Marks Questions

12th Standard EM

    Reg.No. :


Time : 00:45:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. Construct the food chain with the following data.
    Hawk, plants, frog, snake, grasshopper.

  2. Name of the food chain which is generally present in all type of ecosystem. Explain and write their significance.

  3. Shape of pyramid in a particular ecosystem is always different in shape. Explain with example.

  4. Generally human activities are against to the ecosystem, where as you a student how will you help to protect ecosystem?

  5. Explain Grazing food chain with example.

  6. Write a brief note on Detritus food chain.

  7. Discuss the three zones of a lentic ecosystem.

  8. What is ecosystem services? Why it is of much importance?

  9. Nutrients are retained in the ecosystem. Discuss how and name the process through which it is achieved?

  10. According to ten percent law, how many Joules of energy does the individuals at the fourth tropic level will receive; ifthe individuals at first trophic level receives 1000 Joules of energy?


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