Unicellular refers to organisms that are made up of a single cell. These organisms are typically microorganisms, such as bacteria and protozoa. Despite being single-celled, unicellular organisms are capable of carrying out all the necessary functions of life, including reproduction, metabolism, and responding to stimuli. They are found in various habitats, including aquatic environments, soil, and even within the human body. Unicellular organisms serve important roles in the ecosystem, such as recycling nutrients and serving as a food source for other organisms.
