Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 22.5, Problem 1TQ
Summary Introduction
To review:
The differences and similarities in nitrogen and sulfur cycle.
Introduction:
The energy that flows through the ecosystem is dissipated as heat, but the chemical elements get recycled. The biogeochemical cycles involve the transfer of an element or a compound, such as water, between various living and nonliving forms in the biosphere. The important biogeochemical cycles of the earth are carbon, hydrological, nitrogen, sulfur, and phosphorus cycles.
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Microbiology: An Evolving Science (Fourth Edition)
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- Figure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardFigure 46.17 Which of the following statements about the nitrogen cycle is false? Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+). Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2). Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2-). Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardIn terms of the nitrogen cycle and movement of electrons, what is the difference between nitrogen fixation and assimilatory nitrate reductionarrow_forward
- How do humans alter the nitrogen cycle, and what can scientists, engineers, and the public do to mitigate the damage?arrow_forwardwhat are the key chemical transformation in the nitrogen cycle and which ones are affected by human influencesarrow_forwardWhat incentives cause humans to capture nitrogen from the air and pump it into the nitrogen cycle? What are some consequences of human augmentation of the nitrogen cycle?arrow_forward
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