| 1. | Which of the following is an autotroph ? | |
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Tree
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Mushroom
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Insect
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Lion
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Report Question| 2. | Acid rain is caused by the oxides of ? | |
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sulphur and nitrogen
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sulphur only
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nitrogen only
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carbon
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| 3. | First link in any food chain is usually green plants because ? | |
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they alone have the capacity to synthesise food using sunlight
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there are more herbivores than carnivores
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they are fixed at one place in the soil
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they are widely distributed
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| 4. | Which one of the following will undergo fastest bio-degradation ? | |
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Mango peel
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Mango pulp
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Wood
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Mango seed
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| 5. | The depletion of the ozone layer causes ? | |
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acid rain
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earthquakes
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global warming
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increased UV radiations
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| 6. | Accumulation of non- biodegradable pesticides in different trophic levels is called ? | |
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Biological deposition
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Biological concentration
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Biological magnification
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Biological degradation
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| 7. | Which one of the following pairs belong to the category of primary consumers ? | |
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Water beetles & fish
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Snake and frog
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Grasshoppers & cattle
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Eagle and snake
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| 8. | In an ecosystem, herbivores represent ? | |
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decomposers
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secondary consumers
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primary consumers
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producers
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| 9. | Which of the following is a logical sequence of food chain ? | |
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decomposer -> producer -> consumer
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consumer -> producer -> decomposer
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producer -> consumer -> decomposer
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producer -> decomposer -> consumer
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| 10. | Which of the following is a logical sequence of food chain ? | |
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decomposer -> producer -> consumer
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consumer -> producer -> decomposer
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producer -> consumer -> decomposer
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producer -> decomposer -> consumer
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