In the previous chapter, you learned about nitrogen's capacity to exist in a wide range of oxidation states, as well as the strength of the triple bond between nitrogen atoms, which contributes to its remarkable stability and inertness in the atmosphere. Now, let’s take a closer look at the biogeochemical cycle of nitrogen, which is crucial for sustaining life on Earth. This cycle illustrates how nitrogen transitions through various chemical forms and environmental compartments, from the atmosphere to the soil, and ultimately into living organisms.
Reflect on how the processes of nitrogen fixation and biofixation play a crucial role in the nitrogen cycle, and consider how evolutionary adaptations in organisms have enabled them to overcome the challenge of utilizing atmospheric nitrogen.