Bacteria

Bacteria are nature’s recyclers. They break down dead organic matter and "fix" nitrogen in the soil, which plants need to grow.

Bacteria are among the oldest and most successful life forms on Earth. These single-celled microorganisms are found everywhere—from deep-sea hydrothermal vents to the human gut—and play a critical role in maintaining the planet's ecosystems. 1. Anatomy and Structure bacteria

While often associated with illness, the vast majority of bacteria are either harmless or beneficial: Bacteria are nature’s recyclers