Classification

• What should you be able to describe by the end of the video?

  Classification of organisms and evolutionary trees
• Why did scientists begin to classify species?

  To organize the enormous variety of species
• Who began to classify species in the 1700s?

  Carolus Linnaeus
• What are the two kingdoms Linnaeus divided organisms into?

  Animal kingdom and plant kingdom
• What are the categories Linnaeus used to classify organisms?

  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
• What mnemonic can help remember Linnaeus's classification system?

  King Phillip came over for good soup
• If given a classification of an organism, what might you be asked to fill in?

  The missing category in the classification
• What is the binomial name for a zebra?

  Equus quagga
• What does the term "binomial" refer to in classification?

  It means two names for an organism
• What is the binomial name for the polar bear?

  Ursus maritimus
• What is a key fact about Linnaeus's classification system?

  It is based on observable characteristics
• What major advances in biology have occurred since Linnaeus's time?

  Use of microscopes and DNA analysis
• Who developed the three domain classification system?

  Carl Woese
• What are the three domains in the three domain system?

  Archaea, bacteria, and eukaryota
• Where are archaea often found?

  In extreme conditions like hot springs
• What do eukaryota include?

  Animals, plants, fungi, and protists
• How do scientists use evolutionary trees?

  To show relationships between organisms
• What data do scientists use to create evolutionary trees for living organisms?

  Classification data and DNA
• What is a challenge when creating evolutionary trees for extinct organisms?

  Incomplete fossil records
• What does the evolutionary tree indicate about species one, two, and three?

  They share a common ancestor