Classification of Living Things CHAPTER NEW CHAPTER Classification of Living Things the BIG idea Scientists have developed a system for classifying the great diversity of living things. 2.1 Scientists develop systems for classifying living things. 2.2 Biologists use seven levels of classification. 2.3 Classification systems change as scientists learn more. CHAPTER OUTLINE
Scientists develop systems for classifying living things. 2.1 Scientists develop systems for classifying living things. • Living things are arranged in groups based on similarities. classification taxonomy Ocelots are small hunters and tree climbers. Some lynx have thick hair and live in colder climates. Jaguars are muscular cats that may be over two meters long. SECTION OUTLINE
Scientists develop systems for classifying living things. 2.1 Scientists develop systems for classifying living things. • Living things are arranged in groups based on similarities. classification • Classification is the process of arranging organisms into groups. taxonomy • Taxonomy involves classifying as well as naming species. Red pandas have more DNA in common with raccoons. SECTION OUTLINE
Biologists use seven levels of classification. 2.2 Biologists use seven levels of classification. genus Animalia binomial nomenclature Chordata Reptilia dichotomous key Testudines Spotted turtle Clemmys guttata Emydidae Clemmys Guttata SECTION OUTLINE
Classification systems change as scientists learn more. 2.3 Classification systems change as scientists learn more. The most popular system of classification in use today is a three-domain system that includes six kingdoms of organisms. domain Plantae CLASSIFICATION OF LIVING THINGS Animalia Domain: Archaea Domain: Bacteria Domain: Eukarya Protista Fungi Kingdom: Archaebacteria Archaea Bacteria Kingdom: Protista Kingdom: Fungi Kingdom: Plantae Kingdom: Animalia SECTION OUTLINE
2.1 Scientists develop systems for classifying living things. I. Scientists develop systems for classifying living things. classification taxonomy A. Scientists classify millions of species. 1. Classification and Taxonomy 2. Using Classification B. Taxonomists study biological relationships. 1. Physical Evidence 2. Genetic Evidence KEY CONCEPT SUMMARY
Biologists use seven levels of classification. 2.2 Biologists use seven levels of classification. II. Biologists use seven levels of classification. genus A. Linnaeus named about 4000 species. binomial nomenclature 1. Naming Species dichotomous key 2. Using Scientific Names B. Organisms can be classified into seven levels. C. Dichotomous keys and field guides help people identify organisms. KEY CONCEPT SUMMARY
2.3 Classification systems change as scientists learn more. III. Classification systems change as scientists learn more. domain A. Taxonomy changes as scientists make discoveries. Plantae 1. Three Domains Animalia 2. Six Kingdoms Protista B. The two most familiar kingdoms are plants and animals. Fungi 1. Plantae Archaea 2. Animalia Bacteria C. Other organisms make up four more kingdoms. 1. Protista 2. Fungi 3. Archaea 4. Bacteria KEY CONCEPT SUMMARY D. Species and environments change.