90 likes | 153 Views
Delve into the science of naming and classifying organisms, from binomial nomenclature to the modern taxonomy hierarchy. Learn about the principles behind scientific names and explore the classification system developed by Carl Linnaeus.
E N D
Categories of Biological Classification Section 14.1
Taxonomy • The science of naming and classifying organisms • Until the mid-1700s, biologists named an organism by adding descriptive phrases to its common name. • Common names are confusing – because of different languages & different place names
Binomial Nomenclature: • In the 1700s, a Swedish biologist CarlLinnaeus developed a scientific system of naming to solve problems with common names. • Binomial nomenclature – two-name naming system • Now used by scientists everywhere.
Scientific Names: • The unique two-part name for a species (binomial nomenclature). • The first word is the genus - a taxonomic category containing similar species. • The second word is the species – a group of similar organisms that can produce fertile offspring. • Both names are in Latin – the universal language of science. • This genus name is always capitalized; the species name is always lower case. • Both names are either written in italics or underlined.
Grouping Organisms: • Linnaeus had a system of classification for plants and animals only - no bacteria, fungi, or protists. • His system was based only on the organism’s looks. • Modern taxonomy has expanded this system: we have more kingdoms & use relationships to classify groups.
Modern groupings, from most inclusive to least inclusive: • Domain • Kingdom • Phylum • Class • Order • Family • Genus • Species