A bacterium is a single-celled microbe lacking a membrane-bound nucleus, classified as a prokaryote. These ubiquitous organisms are among the most ancient forms of life on Earth, playing critical roles in all ecosystems.
A bacterium is a single-celled microbe lacking a membrane-bound nucleus, classified as a prokaryote. These ubiquitous organisms are among the most ancient forms of life on Earth, playing critical roles in all ecosystems.