1. In the beginning
   1. no one knows
      1. evidence lost
      2. primordial swamp
      3. commet
         1. simple organic molecules
   2. fossil records
      1. organisms evolved
         1. study similarities and differences of fossils
         2. some fossils decay
            1. gap in evolution history / fossil record
         3. common ancestor
            1. most closley related of two species
         4. theory of evolution
            1. Life on earth began as simple organisms from which all th emore complex organisms evolved
            2. can not be proved. just a theory
      2. = any evidence that plant / animal lived ages ago
      3. source
         1. form in rocks
            1. layers formed different times
            2. "date" by layer of rock
         2. minerals replace slowly decaying tissue
      4. features
         1. shells
         2. skeletons
         3. soft tissue
         4. foot prints
         5. habitat
         6. food
2. At the end
   1. extinction
      1. what
         1. can not evolve quick enough
         2. end of species
         3. dinosaurs
         4. mammoths
         5. only fossils remain
      2. why
         1. environment change
            1. too quick
            2. habitat destroyed
         2. predator
            1. humans and dodo
         3. disease
            1. wiped out
         4. competition
            1. food
            2. not stong enough
3. evolution
   1. mutations
      1. DNA change
         1. every day wear and tear
         2. reaction to nasty chemicals
         3. plants growing only in toxic environments
         4. most mutations no effect
      2. Gene mutation
         1. passes to next generation
         2. characteristics
         3. better chance of survival
            1. warm fur
            2. long legs
            3. large leaves
      3. over time
         1. species adapts to environment
            1. evolution = complete new species
      4. natural selection
         1. Charles Darwin
            1. did not know about genes and mutation
            2. struggled with foundation to theory
         2. explains how evolution can occur
         3. allows for chance mutations
         4. controversy at time
            1. against religious belief
            2. different theories
            3. lamarck (1744 - 1829)
            4. used characteristics are passed on
            5. does not account for chance mutation
         5. species
            1. adapted
            2. to environment
            3. better adaption
            4. better survival
            5. breed
            6. pass on characteristics
            7. mutation
            8. shuffling up of parent genes
            9. random mutation
            10. disadvantaged mutation
            11. die
            12. lost from gene pool
            13. advantage mutation
            14. live
            15. accumulate in gene pool
            16. Subtopic 3