Biogeochemical Cycles

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What is denitrification?

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Denitrification is the process by which bacteria convert nitrates (NO3-) and nitrites (NO2-) into nitrogen gas (N2), returning it to the atmosphere.

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What process removes CO2 from the atmosphere in the carbon cycle?

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Photosynthesis is the only process that removes CO2 from the atmosphere, as plants convert carbon dioxide into glucose using sunlight.

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Who carries out each process in the nitrogen cycle?

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Bacteria are responsible for carrying out each process in the nitrogen cycle, including nitrogen fixation, nitrification, and denitrification.

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What type of symbiotic relationship do legumes and nitrogen-fixing bacteria have?

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The relationship between legumes and nitrogen-fixing bacteria is mutualism, where both organisms benefit.

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What is ammonification?

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Ammonification is the process by which decomposers convert organic waste and dead organisms into ammonium (NH4+).

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What is nitrogen fixation?

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Nitrogen fixation is the process by which certain bacteria convert atmospheric nitrogen (N2) into ammonia (NH3) or related compounds, making nitrogen available to plants.

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What role do decomposers play in biogeochemical cycles?

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Decomposers break down dead organisms and waste, recycling nutrients back into the ecosystem.

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What is the significance of the carbon cycle?

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The carbon cycle is significant because it regulates the levels of carbon dioxide in the atmosphere, which is essential for maintaining Earth's climate and supporting life.

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What is the process of nitrification?

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Nitrification is the process by which ammonia (NH3) is converted into nitrites (NO2-) and then into nitrates (NO3-) by bacteria.

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How do plants contribute to the nitrogen cycle?

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Plants contribute to the nitrogen cycle by absorbing nitrates from the soil and using them to synthesize proteins and nucleic acids.

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