Which of the following processes is illustrated by the downward arrows from the atmosphere that show the conversion of nitrogen gas into usable forms available to producers?

Which of the following processes is illustrated by the downward arrows from the atmosphere that show the conversion of nitrogen gas into usable forms available to producers?

The downward arrows from the atmosphere that show the conversion of nitrogen gas into usable forms available to producers illustrate the process of nitrogen fixation.

Nitrogen fixation is the process by which nitrogen gas (N2) is converted into ammonia (NH3) or other nitrogenous compounds. This process is essential for life because nitrogen is a key component of proteins, nucleic acids, and other important biological molecules.

Nitrogen fixation can occur naturally or through industrial processes. Natural nitrogen fixation is carried out by bacteria and archaea. These microorganisms live in the soil or in symbiotic relationships with plants. Industrial nitrogen fixation is used to produce ammonia fertilizer.

The ammonia produced by nitrogen fixation can be used by plants directly, or it can be converted into other nitrogenous compounds such as nitrates and nitrites. These compounds are more readily absorbed by plants and can be used to produce proteins and other essential biomolecules.

Nitrogen fixation is an important part of the nitrogen cycle, which is the biogeochemical cycle that describes the movement of nitrogen through the environment. The nitrogen cycle is essential for life on Earth because it ensures that there is a constant supply of nitrogen available to producers.

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