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Of the pollutants that form acids in the atmosphere, which is easiest to reduce? a. sulfur dioxide b. nitrogen dioxide c. ozone d. carbon monoxide
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Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.
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Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above
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Biology, 22.06.2019 21:30
Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .
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What causes earthquakes and at what types of plate boundaries are earthquakes common? explain....
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