1 taxonomy intro[1][1]

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1 taxonomy intro[1][1]

  1. 1. Hmmm... How about those classifying activities we did? – Was it easy to make up the classification scheme? – Was it easy to follow other people's instructions? – Should it be easy for anyone to follow? – What types of questions make it easier to classify?
  2. 2. Biodiversity • Scientists have identified 1.75 million different species of organisms so far • The number, variety, and genetic variation of different organisms found within a specified geographic region
  3. 3. QUESTIONS TO CONSIDER: Why so many organisms? Why should we care? What purpose do they really serve? Does our existence really depend on them?
  4. 4. How did we get so much Diversity?? EVOLUTION
  5. 5. Taxonomy
  6. 6. What is taxonomy? Taxonomy is the branch of biology concerned with the grouping and naming of organisms Biologists who study this are called taxonomists
  7. 7. How did it start? People wanted to organize their world so they began grouping, or classifying everything they saw.
  8. 8. Things that swim Things that fly Things that crawl Things that walk on four legs Things that chew their food Things that swallow food whole Things that are toxic
  9. 9. Why classify? To help us study the earth To help us organize all the species we discover . . .
  10. 10. To give every species a name based on a standard method so scientists from different countries can talk about the same animal without confusion
  11. 11. An animal is known by two names… Canis lupus is the scientific name for a gray wolf. Canis is the genus name lupus is the species name This system uses a binomial nomenclature
  12. 12. Binomial Nomenclature Bi means two Nomen means name A binomial nomenclature is a classification system using two names to identify an organism
  13. 13. Genus… A genus consists of a group of closely related species Other animals in the Canis group include dogs and coyotes The genus name is always Capitalized
  14. 14. Species... A species consists of animals that can mate and produce fertile offspring Only grey wolves are known as lupus. The species name is always lowercase
  15. 15. What do you get when you cross a Horse and a Donkey? A mule, which is sterile! + =
  16. 16. Who is Carolus Linnaeus? Carolus Linnaeus was a Swedish botanist Developed a 7-level (taxa) classification system based on similarities between organisms
  17. 17. Levels of Classification
  18. 18. The Seven Level System Kingdom Phylum Class Order Family Genus Species King Phillip Called Oprah For Good Spices
  19. 19. 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
  20. 20. When referring to a particular species, it is correct to give both genus and species together. As an example, here is the taxonomic classification for the grey wolf: Kingdom: Animalia Phylum: Chordata Sub-phylum: Vertebrata Class: Mammalia Order: Carnivora Family: Canidae Genus: Canis Species: Canis lupus
  21. 21. When referring to a particular species, it is correct to give both genus and species together. As an example, here is the taxonomic classification for the grey wolf: Kingdom: Animalia Phylum: Mollusca Sub-phylum: Vertebrata Class: Gastropoda Order: Pulmonata Family: Cochliocopidae Genus: Cochlicopa Species: Cochlicopa lubrica
  22. 22. Quick Review What are the seven taxa or levels? Who designed the system? What taxa are organisms named with?
  23. 23. Day 1 Read pages 10-12 Do p. 13 #1-6 Do Activity 1.1 on p. 13 – Snake or Lizard?
  24. 24. Day 2 Dichotomous Keys
  25. 25. Dichotomous Key A two-part key used to identify living things. The key is constructed so that a series of choices must be made, and each choice leads to a new branch of the key. If choices are made accurately, the end result is the name of the organism being identified.
  26. 26. You're Turn Smiley Face Dichotomous Key
  27. 27. Day 2 Work Dichotomous Keys – Smiley Face – Shark Key Read p. 13-15 Do p. 15 #1-11
  28. 28. Levels of Classification
  29. 29. The Seven Level System Kingdom Phylum Class Order Family Genus Species King Phillip Called Oprah For Good Spices
  30. 30. Kingdom/Phylum Mind Maps Introduce Assignment Read p. 24-29 Do p. 30 #1-10

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