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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/5%3A_Biological_Diversity/22%3A_Prokaryotes_-_Bacteria_and_Archaea/22.3%3A_Prokaryotic_MetabolismProkaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in e...Prokaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in every environment by using whatever energy and carbon sources are available. Prokaryotes fill many niches on Earth, including being involved in nutrient cycles such as nitrogen and carbon cycles, decomposing dead organisms, and thriving inside living organisms, including humans.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/20%3A_Biogeochemical_Cycles/20.04%3A__The_Nitrogen_CycleHuman activity can release nitrogen into the environment by two primary means: the combustion of fossil fuels, which releases different nitrogen oxides, and by the use of artificial fertilizers (which...Human activity can release nitrogen into the environment by two primary means: the combustion of fossil fuels, which releases different nitrogen oxides, and by the use of artificial fertilizers (which contain nitrogen and phosphorus compounds) in agriculture, which are then washed into lakes, streams, and rivers by surface runoff.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/03%3A_Evolution_and_Ecology/3.09%3A_SymbiosisThere are many cases, however, where two species live in close association for long periods. Such associations are called symbiotic ("living together"). In symbiosis, at least one member of the pair b...There are many cases, however, where two species live in close association for long periods. Such associations are called symbiotic ("living together"). In symbiosis, at least one member of the pair benefits from the relationship. The other member may be injured (parasitism), relatively unaffected (commensalism) or may also benefit (mutualism).
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.02%3A_Cycles_of_Matter_in_the_Biosphere/17.2B%3A_Nitrogen_CycleThis page explains the nitrogen cycle, highlighting the essential role of nitrogen for life. It describes processes such as nitrogen fixation (by bacteria, archaea, and industrial methods), decay (con...This page explains the nitrogen cycle, highlighting the essential role of nitrogen for life. It describes processes such as nitrogen fixation (by bacteria, archaea, and industrial methods), decay (converting organic nitrogen to ammonia), nitrification (ammonia to nitrates), and denitrification (returning nitrogen to the atmosphere), all driven by microorganisms. It also notes that agricultural practices influence these cycles, sometimes causing ecological problems like eutrophication.
- https://bio.libretexts.org/Bookshelves/Biochemistry/Fundamentals_of_Biochemistry_(Jakubowski_and_Flatt)/02%3A_Unit_II-_Bioenergetics_and_Metabolism/18%3A_Nitrogen_-_Amino_Acid_Catabolism/18.01%3A_The_Biochemistry_of_Nitrogen_in_the_BiosphereThe document explores the nitrogen cycle from a biochemical perspective, covering key reactions such as nitrogen fixation, nitrification, denitrification, and ammonification. It discusses the challeng...The document explores the nitrogen cycle from a biochemical perspective, covering key reactions such as nitrogen fixation, nitrification, denitrification, and ammonification. It discusses the challenges and impacts of industrial nitrogen fixation through the Haber-Bosch process, thermodynamic and kinetic considerations, and the role of microorganisms in these transformations.
- https://bio.libretexts.org/Courses/Norco_College/OpenStax_Biology_2e_for_Norco_College/22%3A_Prokaryotes_-_Bacteria_and_Archaea/22.04%3A_Prokaryotic_MetabolismProkaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in e...Prokaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in every environment by using whatever energy and carbon sources are available. Prokaryotes fill many niches on Earth, including being involved in nutrient cycles such as nitrogen and carbon cycles, decomposing dead organisms, and thriving inside living organisms, including humans.
- https://bio.libretexts.org/Workbench/Bio_1130%3A_Remixed/08%3A_Intro_to_Ecology/8.04%3A_Cycles_of_Matter_in_the_Biosphere/8.4C%3A_Symbiotic_Nitrogen_FixationSymbiotic nitrogen fixation occurs in plants that harbor nitrogen-fixing bacteria within their tissues. The best-studied example is the association between legumes and bacteria in the genus Rhizobium....Symbiotic nitrogen fixation occurs in plants that harbor nitrogen-fixing bacteria within their tissues. The best-studied example is the association between legumes and bacteria in the genus Rhizobium. Each of these is able to survive independently (soil nitrates must then be available to the legume), but life together is clearly beneficial to both. Only together can nitrogen fixation take place.
- https://bio.libretexts.org/Courses/Thompson_Rivers_University/Principles_of_Biology_II_OL_ed/03%3A_Systematics_Phylogeny_and_Biological_Diversity/3.04%3A_Biological_Diversity/3.4.02%3A_Kingdoms_Bacteria_and_ArchaeaProkaryotes were the first inhabitants on Earth, appearing 3.5 to 3.8 billion years ago. Prokaryotes are unicellular organisms that lack organelles or internal membrane-bound structures. Therefore, th...Prokaryotes were the first inhabitants on Earth, appearing 3.5 to 3.8 billion years ago. Prokaryotes are unicellular organisms that lack organelles or internal membrane-bound structures. Therefore, they do not have a nucleus. They generally have a single chromosome—a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid. Most prokaryotes have a cell wall outside the plasma membrane.
- https://bio.libretexts.org/Courses/University_of_Vermont/UVM_Environmental_Science/04%3A_Cycling_of_Matter_in_the_Earth_System/4.03%3A__The_Nitrogen_Cycle
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Map%3A_Raven_Biology_12th_Edition/27%3A_Prokaryotes/27.04%3A_The_Metabolic_Diversity_of_ProkaryotesProkaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in e...Prokaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in every environment by using whatever energy and carbon sources are available. Prokaryotes fill many niches on Earth, including being involved in nutrient cycles such as nitrogen and carbon cycles, decomposing dead organisms, and thriving inside living organisms, including humans.
- https://bio.libretexts.org/Courses/Saint_Mary's_College_Notre_Dame_IN/Foundations_of_Form_and_Function/02%3A_Prokaryotes_Protists_and_Fungi/2.01%3A_Prokaryotes/2.1.04%3A_The_Metabolic_Diversity_of_ProkaryotesProkaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in e...Prokaryotes are metabolically diverse organisms. There are many different environments on Earth with various energy and carbon sources, and variable conditions. Prokaryotes have been able to live in every environment by using whatever energy and carbon sources are available. Prokaryotes fill many niches on Earth, including being involved in nutrient cycles such as nitrogen and carbon cycles, decomposing dead organisms, and thriving inside living organisms, including humans.
