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Why do producers always occupy the first...

Why do producers always occupy the first trophic level on every food chain ?

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Because producers (plants) have the ability to trap solar energy with the help of chlorophyll.
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OSWAAL PUBLICATION-OUR ENVIRONMENT-TOPIC - 1 (ECOSYSTEM AND FOOD CHAIN)(VERY SHORT ANSWER TYPE QUESTIONS)
  1. We often use the word environment. What does it mean ?

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  2. Name two decomposers operating in our ecosystem

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  3. Write one negative effect, on the environment, of affluent life style ...

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  4. Name the two abiotic components of ecosystem.

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  5. What are the various steps in a food chain called ?

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  6. Why do producers always occupy the first trophic level on every food c...

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  7. Why are green plants called producers ?

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  8. In a food chain of frog, grass, insect and snake, assign trophic level...

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  9. The first trophic level in a food chain is always a green plant. Why ?

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  10. Mention the role of micro-organisms like bacteria and fungi.

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  11. Mention the role of decomposers in ecosystem.

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  12. Name the organism (s) belonging to fourth trophic level in the food ch...

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  13. In the following food chain, grass provides 4000 J of energy to the gr...

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  14. Consider a food chain of the following : fish, crab, plankton, shark...

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  15. What will happen if we kill all the organisms in one trophic level ?

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  16. Consider a food chain consisting of: Wheat, Rat, Snakes, Peacock. ...

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  17. Which of the following are always at the second trophic level of food ...

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  18. Choose one consumer each that belongs to the second and third trophic ...

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  19. Pesticides added to a field is seen in increased amount in the crop an...

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  20. What will be the amount of energy available to the organisms of the 2^...

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