Three Domains of Life

The Three Domains of Life, a fundamental classification system in biology, categorize all living organisms into three major groups: Bacteria, Archaea, and Eukarya. This classification is based on differences in cellular structure, genetic makeup, and other fundamental characteristics. Bacteria and Archaea consist of single-celled microorganisms without a nucleus, while Eukarya encompasses more complex organisms with cells containing a distinct nucleus. Understanding the Three Domains of Life provides a foundational framework for exploring the diversity and evolutionary relationships among all living organisms on Earth.