LS1 Week 2 Lab - Andrea Kim Professor Kane LS1 Dem 2D...

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Andrea Kim Professor Kane LS1 Dem 2D April 12, 2016 Natural Selection in the Fossil Record When looking at the modern horse, most people would never think that its ancestor was  ever the size of a dog. The equine morphology has certainly evolved throughout time due to  change in environment. From the data collected, it is visible that natural selection was taking  place from the Early Eocene to the Holocene. The early horse species had to adapt and transform in order to survive the change in their surroundings.  The first members of the horse species were called  Hyracotherium . According to the data we collected, it was a rather small animal with short limbs and digitigrade toes. They also had  small, bunodont teeth. All the characteristics of this species suggest that it lived in a thick, closed canopy forest. Because they were in an enclosed area with a lot of trees and brush, they did not 
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