Final answer:
Precipitation and evaporation help recycle nitrogen, which is essential for all living organisms. The nitrogen cycle is the process that recycles nitrogen through the biosphere.
Step-by-step explanation:
Precipitation and evaporation help recycle nitrogen, which is essential for all living organisms. Nitrogen is an important component of nucleic acids and proteins.
The nitrogen cycle is the process that recycles nitrogen through the biosphere. Nitrogen gas in the atmosphere cannot be directly used by plants and animals, but it can be converted into a usable form by certain bacteria through a process called nitrogen fixation.