Nitrogen Cycle in Ecosystems

Nitrogen Cycle in Ecosystems

Nitrogen is essential for all living organisms, playing a critical role in forming proteins and DNA. Although nitrogen gas (N₂) makes up about 78% of Earth's atmosphere, most organisms cannot use it in this form. Through a series of processes collectively known as th...

Living things need nitrogen to grow and stay alive, but most can’t use nitrogen gas directly from the air. Then how does nitrogen enter the living things?

In ecosystems, nitrogen moves in a cyclic path called the nitrogen cycle. Special bacteria in soil and even lightning can capture nitrogen gas from the air and change it into ammonia in...