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In this image there are green turtles and brown turtles. The green turtles blend in with the grass better than the brown turtles. This makes it easier for the hawk to spot the brown turtles.
In this image there are now less brown turtles because they are getting eaten by the hawk. Also the green turtles are increasing in population because they are camouflaging.
In this image there are no brown turtles because the hawks ate them all so they are no longer reproducing. The green turtles continue to grow in population and the hide from the hawks.
In this image the gene pool has changed to green turtles. The population is starting to die down because only the "genetically fit" turtles are surviving and reproducing.
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