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Principle 1: Genetic Variation Variation exists in the bugs because some are green while some of them of black.
Principle 2: Not all bugs will survive their environment
Principle 3: The green bugs are easier to spot due to the fact that the black bugs are able to blend in with the dark surroundings
Principle 4: SInce the black bugs are able to survive because of its color this allows it to reproduce.
Principle 5: Because the black bugs are able to reproduce over the time the black bug gene will get larger.
AND THATS NATURAL SELECTION
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