Refer to the phylogeny to answer the questions. 1. Are C and D considered sister taxa? 2. At which numbered arrow is the common ancestor for A and E? 3. Which taxon (give the letter) is B most closely related to? 4. Would a group containing C, D, E, and F be considered monophyletic? 5. Is this tree rooted?
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Sister taxa are two descendants that split from the same node. The common ancestor refers to the most recent ancestral form or species from which two different species evolved. A monophyletic group consists of an ancestral species and all its descendants. A rooted Show more…
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Questions 4-6 will focus on the example phylogeny below. This phylogeny is a simplification that uses made-up animals. Each black letter refers to a species. Each blue letter represents an extinct common ancestor. Each red square represents an innovation and is labeled with the new trait: Loss of Stripes Tail Jaws Eyes Antennae Legs Stripes 4. Define the term "outgroup" in your own words and identify the outgroup in this phylogeny. (1 pt) 5. In your own words, define "Sister groups." Based on this phylogeny, which two species are sister species? (1 pt) 6. Identify the common ancestor shared by species B, C, and D. What traits would you expect this common ancestor to exhibit? (2 points).
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