Which of the following substances is not a conservable natural resource?

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Endangered species are organisms that ought to be

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Which of the following bacteria lives in the root nodules of leguminous plants?

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The vector of the sleeping sickness disease parasite is the

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Which of the following infections would not respond to an antibiotic treatment?

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A population which exceeds its carrying capacity and then collapses is represented graphically as a

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The order of primary succession by plants in a very dry habitat is

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The effect of chlorofluorocarbon is

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The major pollutant around airport residential areas is

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Which of these values in kj/m2 likely represents the energy content of the producers in a habitat?

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The amount of energy passed from one trophic level to the next decreases because

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Wind speed is measured with

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