Lab 1 - INTRODUCTION TO PHYSICAL ANTHROPOLOGY ANT 102...

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INTRODUCTION TO PHYSICAL ANTHROPOLOGY ANT 102 Wednesday 11:00 Lab LAB #1: NATURAL SELECTION: EVOLUTION OF THE PEPPERED MOTH Due Date: 2/10/16 Madison Wescott 1
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1. Natural Selection is the process in which individuals with favorable traits for a specific environment thrive and reproduce, while those with less favorable traits eventually become less common and do not survive. Survival of the fittest is basically what natural selection is. 2. Selective pressure is different environmental impacts which may hinder a particular individual’s ability to reproduce. Some examples are disease, predation, or competition. 3. Birds because they apply selective pressure (predation) on the moths. 4. Fitness refers to one’s ability to survive in a given area. So for our moth simulation, depending on the different tree color, the moths each had different levels of fitness. On a darker bark, the dark moths had a greater advantage over the light moths, so they had greater fitness, and vis versa for the lighter bark and the light moths. 5. Those who are more fit to survive (who can camouflage better) are going to survive in the environments that they thrive in. White moths survived better in light bark and dark moths survived better in dark bark. Eventually, those moths who were not best fit for the bark started to die off. If we continued the simulation further, the survival rates for the
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