Bio1100 Chapter 12 Chap 11   The origin and diversification of life on earth   Chap 13
  1. Carolus Linnaeus introduced a system of classification   for grouping and naming similar organisms in hierarchical categories.



     
  2. Classification should reflect phylogeny  , the evolutionary history of organisms based on descent from a common ancestor   .







     
  3. Phylogeny should reflect changes in DNA   as organisms evolve.



     
  4. Current classification groups life into three   domains.

     
  5. Species can arise by allopatric or sympatric speciation   .