Presentation on theme: "From Bacteria to Plants Chapter 1.2/1.3 Classifying Organisms"— Presentation transcript:
1From Bacteria to Plants Chapter 1.2/1.3 Classifying Organisms
2Do You Classify Objects? How would you classify the items in this classroom? Why would it be important to classify things?
3Why Do Scientists Classify? Classification:grouping things based on their similarities.organize living things so organisms are easier to studyTaxonomy:The study of how living things are classified.
4Using the Classification System Taxonomic KeySeries of paired statementsDescribe the physical characteristics of different organisms
5Ex: Lions, Pumas, Housecats Carolus Linnaeusplaced organisms into groups based onobservable featuresNamed organisms withbinomial nomenclature - a 2 part name1st word: Genussimilar organismsEx: Types of Cats2nd word: Speciessmaller groupsEx: Lions, Pumas, Housecats
6Genus Species Example: Felis domesticus Types of CatsHouse Cat
7The 8 Levels of Classification Aristotle and Linnaeus invented today’s classification system in this order:Domain (Broadest)KingdomPhylumClassOrderFamilyGenusSpecies (Narrowest)
8Charles Darwin’s Hypothesis: over time a species gradually changes- known as evolution Studied FinchesFinches flew from South America to theGalapagos islandsAdapted to the new environmentReproducedNew generation changed slightlyto survive in that environmentEx: different beaks5. Finches changed tocreate new species
93 Domains of LifeOrganisms are placed in domains and kingdoms based on:Cell typeAbility to make foodNumber of cells in their bodyBacteria-Prokaryotes-No nucleus-Harmful-strep-Helpful-yogurtArchaea--Prokaryotes-No nucleus-Different chemistryEukarya--Eukaryotes-Have nucleus-Protists-Fungi-Plants-Animals