| 1. | Trophic level in an ecosystem represents ? | |
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salt level
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water level
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oxygen level
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energy level
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Report Question| 2. | Which of the following is biodegradable ? | |
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Iron nails
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Silver foil
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Leather belts
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Plastic mugs
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| 3. | Which of the following statements about food chain and energy flow through ecosystem is false ? | |
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A single organism can feed at several trophic levels.
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Detritivores feed at all trophic levels except the producer level.
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All organisms that are not producers are consumers.
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Food webs include two or more food chains.
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| 4. | Excessive exposure to ultraviolet radiation causes ? | |
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cancer of skin
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jaundice
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damage to the lungs
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inflammation of liver
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| 5. | In a terrestrial ecosystem the biomass of ____________ should be the most ? | |
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Carnivore
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Any one of the above
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Producer
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Herbivore
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| 6. | The best way to dispose waste is by ? | |
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Dumping all domestic waste in litter bin
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Throw the waste on road side
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Separating biodegradable and non biodegradable waste before disposing in bins
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Making a paste of all domestic waste and putting them in a river
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| 7. | World Environment day is celebrated on ? | |
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June 1
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July 5
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June 5
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July 1
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| 8. | Which of the following is an abiotic component of an ecosystem ? | |
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Fungi
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Plants
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Bacteria
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Humus
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| 9. | Which one of the following is an artificial ecosystem ? | |
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Forest
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Lake
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Crop field
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Pond
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| 10. | Which of the following is non- biodegradable ? | |
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Tea leaves
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Animal bones
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Nylon
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Wool
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