Definition
An archaebacterium (singular of Archaebacteria, now called an archaeon) is a single-celled prokaryotic organism belonging to the domain Archaea. It's like one tiny, tough survivor thriving in extreme places! 🌋 These organisms lack a nucleus and often live in harsh conditions, such as hot springs or salt lakes. They are genetically distinct from bacteria, despite their similar appearance. Archaebacteria are important for various ecological processes and are studied to understand early life.