Download Sect. 7.4

 D – domain
 Did
 K – kingdom
 King
 P – phylum
 Phillip’s
 C – class
 Cousin
 O – order
 Order
 F – family
 Fried
 G – genus
 Goose
 S - species
 Special?
 Why do biologists organize living things into groups?
 What do the levels of classification indicate about the
relationship between organisms?
 What characteristics are used to classify orgnisms into
domains and kingdoms?
 Classification – process of grouping things based on
their similarities.
 Biologists use classification to organize living things
into groups so that the organisms are easier to study.
 Taxonomy : the scientific study of how living things
are classified.
 1750’s – Swedish naturalist Carl Linnaeus came up with
a system that we still use today: binomial
nomenclature
 Genus and Species : The first word in an organism’s
scientific name is its genus (classification grouping
that contains similar, closely related organisms)
 Three domains: bacteria, archaea, eukarya.
 Organisms are placed into domains and kingdoms
based on their cell type, their ability to make food, and
the number of cells in their bodies.
 Bacteria – Prokaryotes – organisms whose cells
lack a nucleus.
 Archaea - unicellular prokayotes that are not
bacteria (live in hot ocean floor vent, swamps, and
intestines of cows)
 Eukarya – eukaryotes ( organisms with cells that
contain nuclei)
 Scientists classify eukayotes into one of 4
kingdoms : protists, fungi, plants and animals.
 What are the 8 levels of classification?
 What are the three domains?