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the beetles have to hide to survive from predators
a genetic mutation changed the color of the beetles from green to brown to help camouflage
over time the beetles with the mutation have offspring and are spreading to the next generation.
with this mutation the brown beetles have an advantage that protect them from predators
natural selection helped the beetles with the genetic variation
the genetic mutation was passed down by parents to offspring which led to the brown beetles to become the main population and help the beetles survive from predators.
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