1. Classification of Living Things http://analyzer.depaul.edu/astrobiology/kingdoms.jpg

2. _______________ = branch of biology that names and groups organisms according to their _________________________ Does it have a backbone? Feathers? Gills? Flippers? __________________________ How has organism changed in fossil record? What other organisms is it related to? TAXONOMY CHARACTERISTICS EVOLUTIONARY HISTORY

3. The first person to group or classify organisms was the Greek teacher & philosopher _______________ more than 2000 years ago. (300 B.C.) ARISTOTLE Image from: http://www.ucmp.berkeley.edu/history/aristotle.html

4. Aristotle’s system Based on size of stem PLANTS: Based on where they lived ANIMALS: By: Riedell

5. Problems? 1. Not all organisms fit into Aristotle’s 2 groups (plants or animals) Ex: Bacteria Fungi Images from: http://www.leighday.co.uk/upload/public/docImages/6/Listeria%20bacteria.jpg http://danny.oz.au/travel/iceland/p/3571-fungi.jpg

6. Problems? 2. Common names 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! Image from: http://en.wikipedia.org/wiki/Jellyfish Image from: http://www.alaska.net/~scubaguy/images/seacucumber.jpg

7. Problems? 3. Common names vary from place to place Ex: puma, catamount, mountain lion, cougar are all names for same animal Image from: http://www4.d25.k12.id.us/ihil/images/Cougar.jpg

8. Problems? 4. Same organisms have different names in different countries. Chipmunk Streifenhornchen (German) Tamia (Italian) Ardilla listada (Spanish) Image from: http://www.entm.purdue.edu/wildlife/chipmunk_pictures.htm

9. Solution? Some early scientists devised scientific names using long descriptions in LATIN. RED OAK Quercus foliis obtuse-sinuatis setaceo-mucronatis

10. RED OAK Quercus foliis obtuse-sinuatis setaceo- mucronatis PROBLEMS? Names too hard and long to remember! “oak with leaves with deep blunt lobes bearing hairlike bristles ” Names don’t show relationships between different animals

11. Carolus Linnaeus 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

12. Linnaeus’s System Grouped in a _____________ of 7 different levels Each organism has a two part LATIN __________________ HIERARCHY SCIENTIFIC NAME

13. Kidspiration by Riedell Source: see end of show

14. Kingdom Phylum Class Order Family Genus Species Kids Prefer Cheese Over Fried Green Spinach

15. Kingdom Phylum Class Order Family Genus Species Animalia Chordata Mammalia Carnivora Felidae Panthera leo http://www.vetmed.wisc.edu/dms/fapm/personnel/tom_b/2004-lion.jpg

16. Kidspiration by Riedell

17. BINOMIAL NOMENCLATURE (2 name naming system) 1 st name = _______________ –Always capitalized 2 nd name = _________________ –Always lower case Both names are ______________ or written in ____________. GENUS NAME SPECIES IDENTIFIER UNDERLINED ITALICS

18. Binomial Nomenclature Vampire bat Desmodus 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

19. Binomial nomenclature Humans Homo sapiens Image from: http://www.earlylearning.ubc.ca/images/photo_baby.jpg

20. So what do we use now? Still use Linnaeus’s system: but we have added more _____________ KINGDOMS Remember: Linnaeus only had 2. MODERN TAXONOMY

21. Modern Taxonomy Kidspiration by Riedell

22. MODERN TAXONOMY organizes living things in the context of _________________ Evolution http://animals.timduru.org/dirlist/dino/FlyingDinosaurus-Pterodon-fossil.jpg

23. MODERN TAXONOMY Fossil record Morphology Scientists use different kinds of info to classify organisms: 1.______________________ 2.______________________ 3.______________________ 4.______________________ 5.______________________ Embryology Chromosomes Macromolecules (DNA & proteins)

24. 1. FOSSIL RECORD 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

25. 2. MORPHOLOGY Shape and Function Image from: http://www.angelfire.com/ab7/evolution12/evolutionclues.html

26. MORPHOLOGY _________________ characteristics: same embryological origin (may have similar structure and function) EX: __________________________ HOMOLOGOUS Homologous characteristics suggest a _____________________. Bat wing & human arm Recent common ancestor

27. Bat wing and human arm develop from same embryonic structures HOMOLOGOUS STRUCTURES Image from: http://www.angelfire.com/ab7/evolution12/evolutionclues.html

28. MORPHOLOGY ANALOGOUS ______________ characteristics: may have similar structure & function but different embryological origin EX: _______________________ Bird wing & butterfly wing ANALOGOUS characteristics evolved separately. Organisms ________________________. NOT CLOSELY RELATED

29. Bird wing and butterfly wing have evolved with similar function BUT different structure inside. Insects and birds NOT closely related! ANALOGOUS STRUCTURES http://uk.dk.com/static/cs/uk/11/clipart/bird/image_bird003.html http://www.naturenorth.com/butterfly/images/05a%20tiger%20wing.jpg

30. 3. EMBRYOLOGY Image from: http://calspace.ucsd.edu/virtualmuseum/litu/03_3.shtml Animals whose embryos develop in a similar pattern may be related

31. 4. CHROMOSOMES Similar karyotypes suggest closer relationships. Human: http://www.nationmaster.com/wikimir/images/upload.wikimedia.org/wikipedia/en/thumb/1/18/300px-Human_karyogram.png Chimpanzee: Middle School Life Science, published by Kendall/Hunt.

32. Even differences show relatedness Human: http://www.nationmaster.com/wikimir/images/upload.wikimedia.org/wikipedia/en/thumb/1/18/300px-Human_karyogram.png Chimpanzee: Middle School Life Science, published by Kendall/Hunt. Human- 46 chromosomes Chimpanzee- 48 chromosomes Chimpanzees have 2 smaller chromosome pairs we don’t have Humans have 1 larger chromosome pair (#2) they don’t have.

33. ____________________ All chromosomes have special sequences called TELOMERES at their ends to protect the strands during replication. http://joannenova.com.au/Speaking/Morslids.html TELOMERES IN MIDDLE

34. 2. TELOMERES IN MIDDLE Human chromosome is only human chromosome that has telomere sequences at the ends BUT ALSO IN THE MIDDLE... suggesting it was made by joining two other chromosomes together. http://www.evolutionpages.com/chromosome_2.htm → → →

35. _________________ Chromosome #2 has a second inactive centromere region... suggesting it was made by joining two other chromosomes together. Which chromosomes? http://www.evolutionpages.com/chromosome_2.htm → EXTRA CENTROMERE

36. ________________________ If you take the two smaller chromosomes they have that we don’t, and place them end to end, the banding pattern is identical to human chromosome #2 http://www.evolutionpages.com/chromosome_2.htm BANDING PATTERN MATCHES

37. 5. MACROMOLECULES Compare molecules like _________________ _________________ Organisms with similar sequences are probably more closely related. PROTEINS (amino acids) DNA

39. So what do we use now? _________________- based on multiple kinds of evidence 6 KINGDOMS EubacteriaArchaebacteria Protista PlantaeFungi Animalia Shows evolutionary relationships based on: Morphology Fossil records Embryology Chromosomes Macromolecules (DNA & Proteins)

40. 6 KINGDOM SYSTEM These relationships can be shown in a diagram called a _______________________ PHYLOGENETIC TREE Image from: http://sps.k12.ar.us/massengale/images/clip0075.jpg

41. 3 DOMAIN SYSTEM Group organisms based on the kind of ______________ they have EubacteriaArchaebacteriaProtistaPlantaeFungiAnimalia Bacteria Archaea Eukarya RIBOSOMES OTHER WAYS TO CLASSIFY BESIDES the 6 KINGDOM SYSTEM: So what do we use now?