1) To explain how scientists classify living things 2) To identify the 6 kingdoms of life Taxonomy The science of classification Based on common characteristics All living things are grouped into 3 Domains Under Domains there are 7 other levels Levels of Classification Domain is the largest level Species is the smallest level The more levels that are the same, the more closely related 2 organisms are Together, Genus and species make up the scientific name Ex. Homo sapiens Domains Archaea Bacteria Eukarya Bacteria are grouped into 2 Domains Domain: Archaea Kingdom: Archaebacteria Unicellular Found in extreme environments Domain: Bacteria Kingdom: Eubacteria Unicellular Common 4 Kingdoms of Eukarya Organisms are put in different kingdoms based on: Can they make their own food? Autotrophic vs. Heterotrophic What type of cells? How complex? Prokaryotic vs. Eukaryotic Do they have a cell wall? How many cells? Unicellular (1) Multicellular (many) Animalia Multicellular Heterotrophs cannot make their own food Plantae Multicellular Autotrophs make their own food Fungi Most are many cells Cannot make their own food Most are decomposers Protists Left-overs Unicellular or Multicellular Things that are not fungi, bacteria, plants or animals