The term that describes unicellular organisms capable of thriving in extreme environments is extremophiles.
Extremophiles are fascinating microorganisms that can survive and reproduce in conditions that would be inhospitable for most life forms. These environments can include extreme temperatures, acidity, salinity, and pressure. For example, some extremophiles, known as thermophiles, can live in hot springs or deep-sea hydrothermal vents, while halophiles thrive in highly salty environments like salt flats or salt mines. Their unique adaptations allow them to metabolize and grow where other organisms cannot, making them important for scientific research and potential biotechnological applications.