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A student went to study a local pond. In...

A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain ?

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The correct Answer is:
(a) Weed `to` Tadpole `to` Water beetle (b) Three
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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. Write doen a food chain : (a) in the sea (b) which ends with human...

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  2. At which trophic level a person is feeding when he is eating : (a) r...

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  3. A student went to study a local pond. In one part of the pond she noti...

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  4. Construct (a) a long food chain, and (b) a short foodchain, ending wit...

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  5. (a) State one advantage of using jute bags over plastic bags for shopp...

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  6. We do not clean ponds or lakes but an aquarium needs to be cleaned per...

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  7. What will be the consequence of the absence of decomposers in the ecos...

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  8. Give two differences between food chain and food web.

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  9. Write one or two words for each of the following statements/definition...

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  10. (a) What is meant by biodegradable waste materials ? Give two examples...

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  11. (a) What is meant by non-biodegradable waste materials ? Give two exam...

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

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

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

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  15. Which of the following constitutes a food chain ?

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

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

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

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  19. Which of the following is an artificial ecosystem ?

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  20. Disposable plastic plates should not be used because :

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