Enviromental Cycles Flashcards
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What is the nitrogen cycle ?
The process by which nitrogen is converted between its various chemical forms in the environment.
What role do bacteria play in the nitrogen cycle?
Bacteria convert nitrogen gas into ammonia, nitrites, and nitrates, making nitrogen available to plants.
What is nitrogen fixation?
The process of converting nitrogen gas from the atmosphere into ammonia.
Which organisms are primarily responsible for nitrogen fixation?
Nitrogen-fixing bacteria, such as those in the genus Rhizobium, and certain cyanobacteria.
What is nitrification?
The conversion of ammonia into nitrites and then nitrates by bacteria.
What is the role of nitrates in the nitrogen cycle?
Nitrates are absorbed by plants and used to make proteins and other compounds.
