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Our Environment...

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  • Question 1
    1 / -0

    An ecosystem is a complex interacting system of:

  • Question 2
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    What must be preserved in an ecosystem, if the system needs to be maintained properly?

  • Question 3
    1 / -0

    First link in any food system is a green plant because

  • Question 4
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    In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of:

  • Question 5
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    Which one of the following is contributed by biotic elements to the ecosystem

  • Question 6
    1 / -0

    In the following groups of materials, which group contains only non-biodegradable items?
    (i) Wood, paper, leather
    (ii) Polythene, detergent, PVC
    (iii) Plastic, detergent, grass
    (iv) Plastic, bakelite, DDT

  • Question 7
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    The ultimate source of energy is: 

  • Question 8
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    A rat feeding upon potato tuber is ________.

  • Question 9
    1 / -0

    Ozone-layer is getting depleted because of?

  • Question 10
    1 / -0

    What would happen if all the oxygen present in the environment is converted to ozone?

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