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Chapter 25 (History of Life on Earth (Mass Extinctions (Mass Extinction 3…

- - - - organisms must be able to carry reproduction and be able to process energy
      - believe that self replicating molecules and a metabolic source of building blocks may have appeared together in early protocells.
      - vesicles were what could have created the perfect environment for creating the self replicating molecules the vesicles appeared spontaneously when added to water, creating a hydrophobic and hydrophilic layers
    - - first genertic material was RNA, the origin of self replicationg molcules that eventually made inheritence possible
      - Dr. Jack Szostak created it first vesicle that could build a self replicating RNA strands
    - - The joining of small molecules into macromolecules such as protiens and nucleic acids
      - The Synthesis of RNA monomers, can occur spontaneously
    - - there was little oxygen in the environment so scienitst belived everything started in the water, and that organic compounds formed form similar molecules
      - A.I Oparin and JBS Haldane
      - ocean was a primitive soup where life came from, maybe from deep sea hydrothermal vents or alkaline vents
  - - - animals begin to grow exteriors to defend themselves and evolve more with their surroundings
      - bony fish, insects,and reptiles begin to emerge
      - sudden diversity of animals
    - - Dinasours become the orgins of mammals
      - cone bearing and flowering plants appear
    - - Soft body animals began to appear (jellyfish,coral, and flat worms)
      - oldest fossils of eukaryotic cells appear
    - - animals began evolving to become the animals we have today
      - Priimates
      - evolution of humans began during this time as well
    - - oldest fossils of prokaryotes appear
      - oxygen began to increase in the atomosphere making way for new evolutions
- - - - have commn structures that came from common ancestors
    - - similar structurs at the molecular level
    - - looking at the data and seeing how it works and how it affects the organism
      - Helps us look at the DNA and the difference
    - - not related, but have similar structures
  - - - some but not all of the ancestors
    - - all in the same group, all having the same common ancestor
    - - related, but does not include it most common ancestor
    - - characteristics not found in their ancestors