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Chapter 25 (Evolution (oxygen (very early, but not the earliest…

- - - - takes place in seaside pools
        
        evaporation allows concentration to occur
        
        water freezes
      - absorbed into soil
        
        makes it easy for organic molecules to adhere, fertilizing
        
        allows for a specific orientation to occur
      - absorption by clay
  - - - slow changes, and random occurrences lead to the formation of organic molecules and finally life
        
        with enough time and variables life can generate
  - - - production led to the oxygen rich atmosphere we have today
        
        without it life would still subsist on carbon dioxide instead
        
        photosynthesis continued to add oxygen, effectively killing many carbon dioxide only bacteria
        
        oxygen plays a key role in the ozone layer
  - - - glycolosis takes place
        
        very primal, many organisms use it as either primary or secondary source of energy
        
        even humans make use of glycolosis
      - are capable of modifying molecules to suit needs
      - Absorb material from the ocean to subsist
- - - - adaptations can usually be seen with the naked eye
        
        scientists then inference why the adaptation occurred, and look at previous specimens
- - - - for example, no species can survive in lava, so no natural selection occurs
    - - if all gumballs in a gumball machine are white, you cannot get a red gumball
    - - if everyone survives, no changes be made
  - - - this occurs through human tampering, also known as selective breeding
        
        A good example of this is the seedless grape or watermelon
    - - either adapt to circumstance or perish
        
        those who are better adapted survive more and therefore become ruling genotype
      - shaped nearly every species we see today
      - also known as 'survival of the fittest'
    - - both of these occur simultaneously
      - existing alleles decrease in their prevalence
      - New alleles are formed
      - both of these are constantly hapening
  - - - other parisites
      - weather factors come into play
      - bacteriums
      - environmental changes play a large role
      - bugs
      - all of these factors are pressures that result in the loss of individuals