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Practice problem

Universal Genetic Code (Evolution) — Evidence & Examples

By Deena Hauze
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A simplified tree of life. The tree splits into bacteria, archaea, and eukaryotes. Bacteria include actinobacteria and green sulfur bacteria. The eukaryotes eventually split into a branch that leads to red algae, then a branch that leads to slime molds, then a branch that leads to baker's yeast and fission yeast, then a branch that leads to roundworms, and then a branch that leads to fish.

A simplified biological "Tree of Life"

Image by Madprime CC0 via Wikimedia Commons

Species that have a common ancestor have similar DNA and RNA. The more closely they are related, the more similar their DNA is. Using the "tree of life" above, determine which of the following organisms have the most similar DNA.

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Type a concept, like “slope” or “photosynthesis”.

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