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The nitrogen cycle is an important cycle to the atmosphere. Nitrogen is an essential part of biological molecules such as proteins and nucleic acid, which makes nitrogen essential for all living organisms. Nitrogen makes up 78 percent of the atmosphere.

Answer:

Nitrogen is required for all living things. It is a component in DNA and RNA, proteins, ATP, and chlorophyll in plants. Disrupting the nitrogen cycle can lead to a range of negative effects. ... Most ecosystems are well-adapted to low levels of nitrogen, because naturally most nitrogen is not biologically available