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What makes soil fertile — pebbles, humus or sand?

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Important Questions on Forests: Our Lifeline

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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Write the name of any one insect which acts as scavenger?
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
_____  is an example of a scavenger. (Bear/Vulture)
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Microorganisms act upon the dead plants to produce _____.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Explain how animals dwelling in the forest help it grow and regenerate.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
In given figure, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels:
Clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
_____ is extracted from the seeds of plants such as mustard.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
A food chain always begins with:
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Bacteria are examples of _____.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
What is humus? How is it formed?
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
What are decomposers? Name any two of them. What do they do in the forest?
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Explain how forests prevent floods.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Why should we worry about the conditions and issues related to forests far from us? 
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Which of these is not made up of minerals?
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Explain why there is a need of variety of animals and plants in a forest. 
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Consumers cannot make their own food.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
List five products we get from forests?
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
Microorganisms act upon the dead plants and animals to produce _____.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
A food chain is unaffected by the removal of any link in the chain.
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Science>Biology>Forests: Our Lifeline>Forest Ecosystem
‘A forest has no waste'. Explain this statement with examples.