Classification and Extinction

• What is the Linnaean system used for?

  Classification of living organisms
• How did better microscopes contribute to classification?

  They revealed more about internal structures
• What role did improved chemical analysis play in classification?

  It enhanced understanding of biochemical processes
• What are the main ranks in the Linnaean classification system?

  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
• What is the binomial naming system format?

  Genus Species
• Give an example of a species using the binomial naming system.

  Homo sapiens
• What is Carl Woese's contribution to classification?

  Proposed the three domain system
• What are the three domains in Woese's classification system?

  • Bacteria
  • Archaea
  • Eukaryota
• What characterizes Archaea in Woese's system?

  Prokaryotic cells in extreme environments
• What does the domain Eukaryota include?

  Protists, fungi, plants, and animals
• What do evolutionary trees illustrate?

  Relationships among different species
• What is the definition of extinction?

  No individuals of a species remain
• What factors can lead to extinction?

  Environmental change, new predators, diseases
• What are the data sources for studying extinction?

  • Living species
  • Current classification data
  • Extinct species
  • Fossil data
• How can competition contribute to extinction?

  It limits resources for a species' survival
• What role do catastrophic events play in extinction?

  They can drastically alter habitats and species
• What is a recent ancestor in evolutionary terms?

  A species closely related to another
• What is a distant ancestor in evolutionary terms?

  A species that is less closely related