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  •  Principle 1:  Genetic Variation 
  •  Principle 2: Overproduction and the  Struggle to Survive 
  •  Principles 3: Different Survival  and Reproduction  ( Survival of the fitness)
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  •  Principles 4: Change in the gene pool
  •  There is two different  types of rats in this environment . 
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  •  Adaptation 
  • The cat can only see the grey rats  because  the black ones are harder to see at night. 
  •  Trait selected for: Environment: Adaptation Type  
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  • Biology 
  •  The black rats are starting to reproduce  because they arent getting eaten. 
  • There was  a population of rats in the cemetery. Till a cat  only saw the grey cats  and ended up eating all of the grey rats leaving the black ones to reproduce. 
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  •  There is no more  grey rats in the cemetery because the cat ate them all. 
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  • The two traits were the black rats and the grey rats. There was a lot of rats at the cemetery  but only ended up with one types of rats at the end because the grey rats got eaten over time. 
  • Ms. Mendoza 
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