Classification of Classification of Living ThingsLiving Things
_______________ = _______________ = branch of biology that branch of biology that names and groups names and groups organisms according to organisms according to theirtheir _________________________ _________________________ Does it have a backbone? Does it have a backbone? Feathers? Gills? Feathers? Gills? Flippers? Flippers?
____________________________________________________ How has organism changed in fossil How has organism changed in fossil record?record? What other organisms is it related What other organisms is it related to?to?
TAXONOMY
CHARACTERISTICS
EVOLUTIONARY HISTORY
The first person to group or classify organisms was the Greek teacher & philosopher _______________more than 2000 years ago.
(300 B.C.)
ARISTOTLE
Aristotle 384 B.C.E. Aristotle 384 B.C.E. (Before Common Era)(Before Common Era)
Classified organisms as either plants or animals
He developed the first two kingdoms
Today we now have six identified kingdoms
Animal, plant, protist, eubacteria, archaebacteria, fungi
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Aristotle’sAristotle’s Classification Classification SystemSystem
1616thth Century Classification Century Classification SystemSystem
1717thth Century Century
Problems?Problems? Common names (popular name)can be misleading
Sea cucumber sounds like a plant
but… it’s an animal!
Ex: A jelly fish isn’t a fish, but a seahorse is!
Problems?Problems?Common names vary from place to place
Ex: puma, catamount, mountain lion, cougar are all names for same animal
Problems?Problems? Same organisms have different names in different countries.
ChipmunkStreifenhornchen (German)Tamia (Italian)Ardilla listada (Spanish)
Image from: http://www.entm.purdue.edu/wildlife/chipmunk_pictures.htm
Solution?Solution?Some early scientists devised
scientific names using long descriptions in LATIN.
RED OAK
Quercus foliis obtuse-sinuatis setaceo-mucronatis
RED OAK Quercus foliis obtuse-sinuatis setaceo-mucronatis
PROBLEMS?Names too hard and long to remember!
“oak with leaves with deep blunt lobes bearing hair like bristles”
Names don’t show relationships between different animals
Carolus Linnaeus Carolus Linnaeus comes to the rescue!comes to the rescue!
Devised a new classification system based on _________________
(Organism’s form and structure)
(1707-1778)
MORPHOLOGY
Image from: http://www.medusozoa.com/images/linnaeus.jpg
Carolus Linnaeus 1707-Carolus Linnaeus 1707-17781778Classification systemTaxonomic groups of
related organismsCame up with the
scientific name (two names)
Homo sapiensAlso known as
binomial nomenclature
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Linnaeus’s SystemLinnaeus’s System
Grouped in a _____________
of 7 different levels
Each organism has a two part LATIN __________________
HIERARCHY
SCIENTIFIC NAME
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SpeciesSpecies
Organisms that can only reproduce with their own kind.
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??
KingdomPhylum
ClassOrder
Family Genus
SpeciesEach is called a taxa or taxon.
KingdomPhylum
Class Order
Family Genus
Species
Animalia
Chordata
Mammalia
Carnivora
Felidae
Panthera
leo
Scientific NameScientific Name
Vampire batDesmodus rotundus
Eastern chipmunk Tamias striatus
Image from: http://212.84.179.117/i/Vampire%20Bat.jpg
Image from: http://www.entm.purdue.edu/wildlife/chipmunk_pictures.htm
Our Scientific Our Scientific NameName
Humans
Homo sapiens
Homo sapiens
Image from: http://www.earlylearning.ubc.ca/images/photo_baby.jpg
Classification of ManClassification of ManKingdom AnimaliaPhylum ChordataClass MammaliaOrder PrimatesFamily HominidaeGenus HomoSpecies Homo sapiens
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Modern TaxonomyModern Taxonomy
Kidspiration by Riedell
Hint for 6 Kingdoms:Hint for 6 Kingdoms:Aunt = ArchaebacteriaPatty = ProtistEats= EubacteriaPizza = PlantAnd = AnimalFruit = Fungi
Kingdom EubacteriaKingdom Eubacteria
Single celledProkaryoticMake or absorb
foodCell wall
◦ peptidoglycan
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Kingdom ArchaebacteriaKingdom Archaebacteria
Single celledProkaryoticMake or absorb
foodDNA
◦ Similar to EukaryoticCell wall
◦ Pseudopeptidoglycanor protein only
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Kingdom ProtistKingdom Protist
Single celledEukaryoticIngest or produce
food
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Kingdom FungiKingdom Fungi
MulticellularEukaryoticCell wall
◦ ChitinAbsorb food
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Kingdom PlantaeKingdom Plantae
MulticellularEukaryoticCell wall
◦ CelluloseProduce food
(autotroph)◦ photosynthesis
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Kingdom AnimaliaKingdom AnimaliaMulticellularEukaryoticHeterotrophMovement for
surviveSexual
Reproduction
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MODERN TAXONOMYMODERN TAXONOMYorganizes living things in the context of _________________Evolution
http://animals.timduru.org/dirlist/dino/FlyingDinosaurus-Pterodon-fossil.jpg
How the organism has changed over time…years.
CladogramCladogram
Evolutionary relationship of a group of organisms
Each clad (group) share something in common
Ancestral traits are the oldest
Derived traits evolved later
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Cladogram for Cladogram for TransportationTransportation
Wheels are the most ancestral
Wings are the most derived
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Construct a CladogramConstruct a Cladogram
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GorillaGorilla
Four limbsFurLost tail
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TigerTiger
Four limbsFurTail
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LizardLizard
Four limbsTail
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FishFish
Tail
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ChimpanzeeChimpanzee
Four limbsFurLost tail
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Clad With 4 LimbsClad With 4 Limbs
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Clad With FurClad With Fur
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Clad With No TailClad With No Tail
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Gorilla Tail?Gorilla Tail?
How do we know the gorilla lost its tail?
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Gorilla’s Vestigial TailGorilla’s Vestigial Tail
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Gorilla Human
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Fish
Amphibians
Reptiles
Birds Mammals
MODERN TAXONOMYMODERN TAXONOMY
Fossil recordMorphology
Scientists use different kinds of info to classify organisms:1. ___________________2. ____________________3. ______________________4. ______________________5. ______________________
Embryology: development in womb
ChromosomesDNA
How organisms have changed over time
Shape and function
Embryology= zygote, embryo, fetus
1. FOSSIL 1. FOSSIL RECORDRECORD
Evolutionary history = _____________
PHYLOGENY
We can trace some changes over time through the fossil record.
http://www.familyeducation.com/printables/display/0,2361,1650,00.gif
2. MORPHOLOGY2. MORPHOLOGY Shape and Function
Image from: http://www.angelfire.com/ab7/evolution12/evolutionclues.html
Bat wing and human armdevelop from same embryonic structures
Image from: http://www.angelfire.com/ab7/evolution12/evolutionclues.html
Bird wing and butterfly winghave evolved with similar function BUTdifferent structureinside.
Insects and birds NOT closely related!
ANALOGOUSSTRUCTURES
http://uk.dk.com/static/cs/uk/11/clipart/bird/image_bird003.html
http://www.naturenorth.com/butterfly/images/05a%20tiger%20wing.jpg
3. 3. EMBRYOLOGYEMBRYOLOGY
Image from: http://calspace.ucsd.edu/virtualmuseum/litu/03_3.shtml
Animals whose embryos develop in a similar pattern may be related
Kidspiration by RiedellImage sources: see end of show
Image SourcesImage Sources
http://www.kidskonnect.com/Lions/lion.gif
http://www.seattleschools.org/schools/blaine/
http://www.geocities.com/TheTropics/2428/directory.html
http://www.gifs.net
http://people.eku.edu/ritchisong/homepage.htm
http://anthro.palomar.edu/animal/images/platypus.gif
http://www.drtoy.com/news/
http://www.ca4h.org/4hresource/clipart/animals/pics/dog.gif
http://www.madlantern.com/clipart/cindexw.htm
http://www.chm.bris.ac.uk/motm/trimethylamine/fish.gif
http://www.gifs.net
http://www.dallas-zoo.org/featured/featured.asp?page=wc
http://www.animationlibrary.com
http://www.dynamicearth.co.uk/education/images/tree_frog.jpg