2 BiodiversityBiodiversity – the variety of organisms considered at all levels from populations to ecosystems.
3 TaxonomyTaxonomy – the science of describing, naming, and classifying particular organisms.Taxon – a particular group within the taxonomic system.
4 The Linnaean System Developed by naturalist Carolus Linaeus Grouped organisms according to their form and structure (morphology)Organisms are grouped by similarities.
5 Levels of Classification DomainKingdomPhylumClassOrderFamilyGenusSpecies
6 King Philip Came Over For Good Soup I H L R A E PN Y A D M N EG L S E I U CD U S R L S IO M Y EM S
7 Nomenclature Each species has a scientific name Binomial nomenclature – a two part nameGenusSpeciesNames come from Greek and LatinWritten in italicsGenus (first letter capitalized) species (lowercase)Examples:Homo sapiensE. coli
8 SystematicsPhylogenetics – the analysis of evolutionary or ancestral relationships among taxaCladistics – a system of phylogenetic analysis that uses shared and derived characters for grouping taxa
9 Shared character – a feature that all members of the group have in common Derived character – a feature that evolved only within the group under considerationClade – the group of organisms that includes an ancestor plus all of its descendants
17 Warm-up What is taxonomy? Why bother to classify organisms? What is the purpose of a scientific name?What two taxa make up an organisms scientific name? How is this scientific name correctly written?Write these scientific names correctly:mola molahomo sapianstyrannosaurus rex