Taxonomy The science of classifying organisms. Classify To

Taxonomy The science of classifying organisms. Classify  To

Taxonomy The science of classifying organisms. Classify

To arrange according to similarities or differences. Why classify? Biologists use classification to organize living

things into groups so that the organisms are easier to study. We classify to make our lives easier.

History of Taxonomy Aristotle

Simple classifications Used common names Plant or animal? If an animal does it have blood?

does it Fly Swim Walk/Crawl

DISCUSSION QUESTION - Using Aristotle's 3group system (based on movement), name 2 animals that would fit each of the 3 groups.

Problems with this system? Some animals can walk, swim, and fly What technology helped scientist improve

the classification system? Microscope -1600s Carolus Linnaeus 1700s

Described organisms with two word names, instead of polynomials Developed binomial nomenclature First word = Genus name (Capitalized)

Second word = species name (lowercase) scientific name Example Canis lupus Always italicized or underlined

Why binomial nomenclature? Binomial - 2 name Nomenclature naming system

Much easier than a 10+ word name under old polynomial system Same name no matter where you go (Latin) Less confusion

Devil Cat Ghost Cat

Mountain Lion Screaming Cat

Puma Florida Panther

Cougar Felis concolor

Taxonomic Hierarchy Names organisms and their relationships from very broad to very specific

Classification of Living Things Milky way

Solar System Earth U.S. Ohio

Westerville Mainsail Dr. 283

Domain Kingdom Phylum Class

Order Family Genus Species

Three Domains of Life There used to be 2,

why do you think there are 3 now? Domain Archaeabacteria: Life's Extremists...! Archaea are found

in the harshest environments on Earth, and are the oldest known organisms on Earth, appearing in the fossil record over 3.6 BILLION years ago (3,600,000,000 years ago!)

Domain Bacteria (or Eubacteria): is familiar to most people when associated with human or animal disease. However, most bacterial species do not

(and cannot) cause disease. Most species even play beneficial roles for humans by producing antibiotics and food.

Domain Eukarya A single-celled or multicellular organism whose cells contain a distinct membrane-bound

nucleus. (Organisms cell has a nucleus.) Domain

Kingdom Phylum Class Order

Family Genus Species

Pro = before Why has taxonomy changed throughout history?

Do you think it will continue to change? Prokaryotes

We are now filling out our charts Archaea Unicellular prokaryotes

Autotrophs Cell wall Eukaryotes

Eu = true Have membrane bound nuclei

Most are unicellular Phylum examples

Chordata Cord Chordates Hollow dorsal nervous chord, notochord, pharyngeal slits, endostyle, post-anal tail about 100,000+ Cnidaria Stinging nettle Coelenterates

Nematocysts (stinging cells) about 11,000 Ctenophora Comb bearer Comb jellies Eight "comb rows" of fused cilia about 100 modern species

Cycliophora Wheel carrying Symbion Circular mouth surrounded by small cilia Classification of Humans

Kingdom Animalia Phylum Chordata

Class Mammalia Order Primates

Family Hominidae Genus Homo

Species sapiens 52

Is your table filled out? Dont lose it!!!

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