12. Donkeys and buffaloes have blunt teeth. Why? Are they omnivores? Give reason

to support your answer.

13. Is cat an omnivore? Give reason to support your answer.

14. Bhuvan (a rickshaw puller) needs more carbohydrates in his diet than Sachin (a

shopkeeper). Why?

15. Differentiate between natural and synthetic fibres. Also give one example of no

natural and synthetic fibres.

16. There are two fibres A and B. Both of them are obtained from plants. Fibre A is

quite rough and very strong and is used for making gunny bags and ropes. Fibre B

is quite soft and is used as a filling for pillows and mattresses.

Identify fibres A and B. Also mention their uses in daily life?

17. What are the main sources of food? Give one example of each.

18. What are the two main processes of making fabric from yarn? Also explain each


19. Explain the process of extracting jute fibres from jute plant.

20. What are the ingredients present in chicken curry and rajma? Classify the

ingredients based on their sources.

21. How can you test the presence of sugar in a food item? Explain the process.

22. A)Why do we need to include proper amount of water in our diet? Give two points

B) Why do we need to include proper amount of roughage in our diet? Give one point

1 Answer

  • Answer:

    12. They have blunt teeth to grind the grass. As they eat only grass so they fall in the category of herbivore animals and not in omnivores

    13.Yes cat is an omnivore because it can eat both flesh and veg food items such as chapati

    14.Bhuvan needs more carbohydrates because his work is more complex, he needs more energy to pull rickshaw than Sachin( a shopkeeper)

    15.Synthetic fibres are those fibres which are prepared in factories with chemicals simply they are man made fibres for eg:nylon whereas the natural fibres are those which we get from plants and animals for eg: cotton

    16.FibreA: Jute, Fibre B:cotton

    17.Plants: wheat, Animals :flesh

    18.2 process are weaving and knitting

    weaving is the process of making cloth or fibre.

    19. First the jute stems are extracted by retting and then they are bundled together .


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