If a top predator disappears from a forest, the most likely first effect is A Producers stop growing B Decomposers
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Chapter 32: Forests, Wildlife Conservation and Biodiversity (Set-3)
When a forest is called a “biodiversity storehouse,” it mainly means it has A Only one species B Many life
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In a forest food web, the main role of herbivores is to A Make their own food B Eat producers
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Forests are called “lungs of Earth” mainly because they A Make artificial oxygen B Reduce soil minerals C Increase desert
Continue readingChapter 31: Pollution, Climate Impact and Forest Loss (Set-5)
A room heater using coal is left on overnight with windows shut; which immediate biological danger becomes highest, even before
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A flame becoming yellow and smoky while cooking usually suggests what change in the air–fuel condition at the burner? A
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A blue flame in an LPG stove usually indicates what about the burning process compared to a yellow flame? A
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In a poorly ventilated kitchen, why can a coal or charcoal stove become risky even if the flame looks normal?
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Why can incomplete burning of petrol or coal in a closed room become dangerous for people inside? A Makes more
Continue readingChapter 30: Combustion, Flames and Fuel Efficiency (Set-5)
In a closed glass jar, a burning candle goes out after some time mainly because the jar runs out of
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