![]() Text reads Because black mice had a higher chance of leaving offspring than tan mice, the next generation contains a higher fraction of black mice than the previous generation. In the third panel there are 7 black mice and 2 tan mice. ![]() An arrow points from the second panel to the third with text reading Mice reproduce, giving next generation. Only the surviving mice reach reproductive age and leave offspring. Thus, tan mice are eaten at higher frequency than black mice. The first stage is called Construction Speedups. This guide contains some tips on how to do well. Text reads Tan mice are more visible to predatory birds than black mice. Survival of the Fittest is a recurring weeklong event that consists of different stages. In the second panel there are 3 black mice and 2 tan mice. An arrow points from the first panel to the second with text reading Some mice are eaten by birds. Due to natural genetic variation, some mice are black, while others are tan. Text reads A population of mice has moved into a new area where the rocks are very dark. In the first panel there are 3 black mice and 6 tan mice. A 3-panel cartoon, each showing a hawk flying above a group of mice.
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