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(a) What is a food chain ? Give one exam...

(a) What is a food chain ? Give one example of a simple food chain.
(b) What is a 'food web' ? Show its formation.

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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. (a) What is meant by non-biodegradable waste materials ? Give two exam...

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  2. (a) Define an ecosystem. Give examples of any two ecosystems. (b) L...

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  3. (a) What is a food chain ? Give one example of a simple food chain. ...

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  4. (a) What is meant by 'environment' ? (b) What type of substances are...

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  5. Which of the following constitutes a food chain ?

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  6. In a food chain, the initial organism is usually :

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  7. Which of the following represents a possible food chain found in a pon...

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  8. Which of the following are decomposers of dead organisms ?

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  9. Which of the following is an artificial ecosystem ?

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  10. Disposable plastic plates should not be used because :

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  11. In a food chain, the third trophic level is always occupied by :

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  12. Accumulation of non-biodegradable pesticides in the food chain in incr...

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  13. If a grasshopper is eaten by a frog, then the energy transfer will be ...

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  14. An ecosystem includes :

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  15. The decomposers in an ecosystem :

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  16. What will happen if deer is missing in the food chain given below ? ...

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  17. Organisms which synthesise carbohydrates from inorganic compounds by u...

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  18. Organisms of a higher trophic level which feed on several types of org...

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  19. In the following groups of materials, which group/groups contain only ...

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  20. Which of the following statement is incorrect ?

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