How Does Natural Selection Work?
This video shows the rock pocket mouse as an a example of Darwin's process of natural selection. Not only is evolution happening right now everywhere around us, but adaptive changes can occur in a population with remarkable speed. This speed is essential if you're a desert mouse living in an environment where a volcanic eruption can reverse selective pressure in nearly an instant. The story illustrates how pocket mice show us how random changes in the genome can take many paths to the same adaptation—a coloured coat that hides them from predators.
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As you watch the video above think about what selective pressures from the environment are causing changes in population of mice
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