unicellular organisms

Unicellular organisms are living beings made up of a single cell. These tiny life forms can perform all necessary functions for survival, such as feeding, growth, and reproduction, within that one cell. Examples include bacteria, amoebas, and yeast. Despite their simplicity, they play crucial roles in ecosystems, such as decomposing organic matter and forming the basis of the food chain. They can be found in a variety of environments, including soil, water, and even inside the human body, where they can sometimes be beneficial or harmful.