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Unit 7

7.7 Common Ancestry

1 min readmay 31, 2020

lani

Lani Himegarner


AP Biology 🧬

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Evolutionary Theories

Similar to using genetic code as an example for evolutionary theory, there are other examples of evidence at the molecular level. There are more structural similarities within the cells of eukaryotes that could help piece together the past. For example, eukaryotic cells all have membrane bound organelles, linear genes, and genes that contain introns. 
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Image courtesy of Giphy.

These similarities are used as evidence to support the evolutionary theory, as it would be nearly impossible for each of these things to develop separately in each animal. It is more likely that these characteristics have continued to be present in eukaryotic cells as organisms continue to evolve.
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