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History of life on Earth (Key events (Colonization of land (True roots and…

- - - - Come from fossilized stromatolites
      - 3.5 billion years ago
  - - - Approx 3850 million years ago
    - - Approx 2500 years ago
    - - Around 4600 million years ago
    - - Paleozoic
      - Mesozoic
        
        Age of reptile
      - Cenozoic
      - Approx half billion years ago
  - - - 600-535 million years ago
    - - 535-525 million years ago
    - - 1.2 billion years ago
- - - - Climate change
      - It promotes allopatric speciation on a grand scale
      - It can help explain puzzles about the geographic distribution of extinct organisms
      - It alters the habitats in which organisms live
  - - - Permian
        
        Claimed about 96% of marine animal species
        
        500 million years ago
      - Cretaneous
        
        Occurred 65.5 million years ago
        
        Extinct more than half of marine species
    - - It takes 5-10 million years for species to recover
      - It alter ecological communities
      - It can curtail lineage with novel and advantageous features
      - Adaptive radiation
- - - - Result of speciation
    - - Result of gene duplication
  - - - Archae
      - Eukarya
      - Bacteria
  - - - Show pattern of descent, not phenotypic similarity
      - It does not indicate the actual ages of the particular species
  - - - Domain,kingdom,phylum, class, family, order,genus,and species
    - - Parts
        
        Second - Species
        
        Italiced
        
        First - Genus
        
        Capitalized and italiced
      - By Carolus Linnaeus
- - - - Protocells
      - Self replicating RNA
      - Abiotics
  - - - It uses
        
        Uranium-238
        
        It has a half life of 4.5 billion years
        
        Carbon-14
        
        It has a half life of 5730
        
        Works for fossil of up to 75000 years
      - It is based on half life of radioactive isotopes