Examples include:
* Bacteria: These are some of the most common and diverse organisms on Earth.
* Archaea: These are single-celled organisms that are often found in extreme environments like hot springs or salty lakes.
* Protists: This is a diverse group that includes amoebas, algae, and slime molds.
* Yeast: These are single-celled fungi that are often used in baking and brewing.
Unicellular organisms are incredibly important to the planet's ecosystems and have many fascinating features.
