Trophic levels are formed by
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The drug morphine is extracted from _______ plant.
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Producers are otherwise known as
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Decomposers are otherwise called as
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The pollution which does not persistent harm to life supporting system is
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The response of predator to prey and vice-versa, over ten of thousands of years, produces physical and behavioral changes in a process called
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The most important reason why summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere is that:
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The most important reason for decrease in biodiversity is
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Soil erosion can be prevented by
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____________ is one of the most endangered species of Indian birds
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Acid rain contains
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Water from springs contain dissolved __________ compounds which are used to cure some skin diseases.
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Which of the following is considered a variable gas in the earth's atmosphere?
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The limitating factor in temperate and boreal forest is
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Eutrophication of water bodies resulting to killing of fishes is mainly due to non-availability of
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The ozone at ground level is primarily from __________ precursors.
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Gas released during photosynthesis is
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The earth's first atmosphere was composed primarily of:
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Which gas is likely to be reduced in the atmosphere by deforestation?
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In a volume of air near the earth's surface, ____ occupies 78 percent and ____ nearly 21 percent.
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