Presentation on theme: "Classification of Living Organisms. As living things are constantly being investigated, new attributes are revealed that affect how organisms are placed."— Presentation transcript:
As living things are constantly being investigated, new attributes are revealed that affect how organisms are placed in a standard classification system. 2
What is taxonomy? Taxonomy is the branch of biology concerned with the grouping and naming of organisms Biologists who study this are called taxonomists
How did it start? People wanted to organize their world so they began grouping, or classifying everything they saw.
Examples: Things that break down dead materials Things that reproduce sexually Things that are single-celled Things that have cell walls Things that eat other organisms Things that have a nucleus Things that are multicellular TPS: What categories of living things do you remember?
Why classify? To help us see relationships, similarities and differences To help us organize all the organisms we discover...
To give every species a name based on a standard method so scientists from different countries can talk about the same animal without confusion
Who is Carolus Linnaeus? Carolus Linnaeus was a Swedish botanist Developed a 7-level (taxa) classification system based on similarities between organisms
The Seven Level System Domain Kingdom Phylum Class Order Family Genus Species Dear King Phillip Called Oprah For Good Spices
Domains Domains are the broadest taxonomic classification of living organisms The three Domains: Archaea Bacteria Eukarya 10
Domains are Divided into Kingdoms Archaea----- Archaebacteria Bacteria ------ Eubacteria Eukarya ------- Protist Fungi Plantae Animalia 11
How does it work? There are 6 broad kingdoms Every living thing that we know of fits into one of the six kingdoms Each level gets more specific as fewer organisms fit into any one group
The grouping of organisms into KINGDOMS is based on 3 factors: –1. Cell Type (prokaryotic or eukaryotic) –2. Cell Number (unicellular or multicellular) –3. Feeding Type (autotroph or heterotroph) 14
1. Cell Type- The presence or absence of cellular structures such as the nucleus, mitochondria, or a cell wall Prokaryotes or Eukaryotes 15
Prokaryotes – Bacteria! DO NOT HAVE : An organized nucleus Structured organelles 16
2 nd criteria for Kingdom Divisions: Cell Number Unicellular- single celled organism – protozoans, bacteria, some algae Multicellular- many celled organism – cells start to specialize/differentiate 20
3 rd Criteria for Kingdom Divisions Feeding Type - How the organisms get their food –Autotroph or Producer Make their own food –Heterotroph or Consumer Must eat other organisms to survive Includes decomposers – those that eat dead matter! 22