- Slides: 14
Classification: Sorting It All Out
Classification • Putting things into orderly groups based on similar characteristics
Why do biologists classify organisms? • To help make sense and order of the many kinds of living things in the world
Who founded modern taxonomy? • Carolus Linnaeus
What is taxonomy? • The science of describing, classifying, and naming living things.
What system of classification is used today? • An eight level system based on shared characteristics
What does a branching diagram show? • Similarities and differences among organisms
What does a branching diagram look like? ORGANISMS TIMELINE CHARACTERISTICS
What are the eight levels of classification?
Why do scientists use scientific names? • To be clear and precise when they refer to a living thing • A scientific name remains the same for a specific kind of organism
What are the two parts of a scientific name? • Genus, species – Example: Tyrannosaurus rex
What is a dichotomous key? • An identification aid that uses sequential pairs of descriptive statements. • By working through the statements in the key order, a person can identify an organism.
What is it?
How do dichotomous keys help scientists? • By matching an organisms characteristics to the descriptive statements, a scientist can identify an unknown organism. • For example, your walking through the forest and you don’t know if the vine is poison ivy. Using a dichotomous key, you can match the characteristics and identify the plant.