How did Carl Linneaus's original classification system differ from today?
Carl Linneaus's original classification system was based on the physical characteristics of organisms. He divided organisms into two kingdoms, Animalia and Plantae, and then further divided them into classes, orders, genera, and species. This system was based on the idea that organisms could be grouped together based on their physical similarities.
Today, the classification system is based on evolutionary relationships between organisms. Organisms are divided into three domains, Bacteria, Archaea, and Eukarya, and then further divided into kingdoms, phyla, classes, orders, families, genera, and species. This system is based on the idea that organisms can be grouped together based on their evolutionary relationships.