natural slection

• Darwin theory of evolution

  1. Genetic variation(all individuals vary)
  2. Environmental change(lack of food,water,space)
  3. Must be competition in environment
  4. Natural selection/survival of the fittest
  5. Inheritance(surviving individuals reproduce and pass on successful ene to offspring)
• What is natural slection(happens because of variation)

  individuals have better traits suited to the environment than others
• Bionominal classification

  • An organisms scientific name had 2 Latin words referring to genus and species(Genus is capital and species is always lowercase)
  • E.g common name is human but scientific name is Homo(genus)sapiens(species)
• A traditional way of classifying is splitting organisms into 5 kingdoms

  1. Plant(e.g.flowers,trees are multicellular)
  2. Animal(e.g.animals,dogs are multicellular)
  3. Fungi(e.g.mushrooms,yeast are multicellular)
  4. Prokaryotes(e.g.bacteria are unicellular)
  5. Protists(e.g. algae,ambodea are unicellular)
• Carl woese proposed that the three domains of life above the kingdoms are

  bacteria

  archaea(primitive bacteria which lives in extreme environments)

  eukaryotic(protists,Fungi,animals and plants)
• • Linnanean system

  Carl linnaeus discovered the traditional way to classifying organisms into groups based on their similarities in there structures and characteristics.
• Carl linnaeus grouped each organism into

  1. Kingdom
  2. Phylum
  3. Class
  4. Order
  5. Family
  6. Genus
  7. Specie
• Carl woese developed 3 domain system using genetic analysis