Classification

• Why do we need a classification system for species on Earth?


  To organize and categorize the millions of different species.
• How did our ancestors classify species?


  They often classified them based on their appearance.
• What is a limitation of using simple names for species?


  Simple names do not indicate how related different species are.
• What is the Linnaean system of classification?


  A classification system that groups species based on characteristics and structures.
• What are the main categories in the Linnaean classification system?


  Kingdom, phylum, class, order, family, genus, and species.
• Why are the names in the Linnaean system mostly in Latin?


  It was designed hundreds of years ago for universal use across different countries.
• What is the binomial naming system proposed by Linnaeus?


  A system that names species using their genus and species names.
• How should species names be formatted in the binomial naming system?


  Italicized with only the first letter of the genus capitalized.
• What did Carl Woese propose in the 1990s regarding classification?


  He proposed the three-domain system based on RNA sequence analysis.
• What are the three domains introduced by Carl Woese?


  Eukaryota, Bacteria, and Archaea.
• What does the domain Eukaryota include?


  All organisms with eukaryotic cells, such as plants, fungi, and animals.
• How are Bacteria and Archaea different?


  Bacteria are single-celled prokaryotic organisms found almost everywhere, while Archaea are a different type of prokaryotic cell often found in extreme conditions.
• What are evolutionary trees used for?


  To show the evolutionary relationships between different species or groups.
• How can evolutionary trees indicate relationships between species?


  By linking common ancestors and showing how species diverged.
• What does it mean when a line splits in an evolutionary tree?


  It indicates that a common ancestor is splitting into two different species.
• What methods do scientists use to learn about evolutionary relationships?


  They compare the structure and DNA of different species, including fossil records.
• What is a mnemonic, and how can it help in remembering classification order?


  • A mnemonic is a phrase used to help remember terms in a list.
  • Example: "Dear Kate Please Come Over For Great Spaghetti" helps recall Domain, Kingdom, Phylum, etc.
• What is the order of classification groups from broadest to most specific?

  Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.