Exam 22: Microbes in Global Elemental Cycles

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Marine dead zones are characterized as being

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The following image is evidence supporting ________ on Mars. The following image is evidence supporting ________ on Mars.

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The element with the highest percentage of dry weight in bacteria is

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What are the major limitations to nitrogen fixation? How do organisms overcome these limitations?

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The highly potent greenhouse gas N₂O generates ________ the warming effect of CO₂.

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What are two mechanisms used by marine organisms to adapt to the scarcity of phosphorous?

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The figure below shows the ignition of methane from what source? Why is this methane source a major concern for global warming? The figure below shows the ignition of methane from what source? Why is this methane source a major concern for global warming?

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Phosphorus is a fundamental element of which biological molecule?

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How are wetlands similar to or different from commercial wastewater treatment plants?

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What is one of the main challenges of treating industrial runoff versus municipal wastewaters?

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