How do scientists put organisms into groups?

Scientists classify organisms into groups using a system called taxonomy, which organizes living things based on shared characteristics and evolutionary relationships. This system typically ranks organisms from broad categories to more specific ones, including domains, kingdoms, phyla, classes, orders, families, genera, and species. The classification relies on various criteria, such as morphology (physical features), genetics, and behavior. This hierarchical structure helps scientists communicate about organisms and understand their ecological roles and evolutionary history.