Question

1. Why is an unrooted phylogeny an issue for understanding evolutionary relationships? 2. You discover fossil evidence that you think will help resolve the tree: the roc was the earliest species to diverge (i.e. are the outgroup in relation to) from the other five creatures. Use this information to help resolve the phylogeny, and draw this resolved tree. 3. Your colleague completely upends your interpretation of the fossil, pointing out that what you thought were wings are actually fins - this means that the taniwha was actually likely the earliest to diverge (an alternative outgroup hypothesis)! This changes the potential resolved tree! Draw the newly resolved tree. 4. Compare and contrast your two potential rooted phylogenies. What is one evolutionary conclusion that is quite different between the two? 6. (8 points) On an astrobiology voyage in the year 3031, you return to the ocean planet from problem #2. After a painstaking expedition that collected and described 5 potential species (named A-E, sampled randomly from potentially millions of undescribed species), you collected the following data on five different traits. These are all binary traits, where things are either present or absent: venom, sentience, tentacles, flight, a single (humongous) eye.

          1. Why is an unrooted phylogeny an issue for understanding evolutionary relationships?

2. You discover fossil evidence that you think will help resolve the tree: the roc was the earliest species to diverge (i.e. are the outgroup in relation to) from the other five creatures. Use this information to help resolve the phylogeny, and draw this resolved tree.

3. Your colleague completely upends your interpretation of the fossil, pointing out that what you thought were wings are actually fins - this means that the taniwha was actually likely the earliest to diverge (an alternative outgroup hypothesis)! This changes the potential resolved tree! Draw the newly resolved tree.

4. Compare and contrast your two potential rooted phylogenies. What is one evolutionary conclusion that is quite different between the two?

6. (8 points) On an astrobiology voyage in the year 3031, you return to the ocean planet from problem #2. After a painstaking expedition that collected and described 5 potential species (named A-E, sampled randomly from potentially millions of undescribed species), you collected the following data on five different traits. These are all binary traits, where things are either present or absent: venom, sentience, tentacles, flight, a single (humongous) eye.

1. Why is an unrooted phylogeny an issue for understanding evolutionary relationships?

2. You discover fossil evidence that you think will help resolve the tree: the roc was the earliest species to diverge (i.e. are the outgroup in relation to) from the other five creatures. Use this information to help resolve the phylogeny, and draw this resolved tree.

3. Your colleague completely upends your interpretation of the fossil, pointing out that what you thought were wings are actually fins - this means that the taniwha was actually likely the earliest to diverge (an alternative outgroup hypothesis)! This changes the potential resolved tree! Draw the newly resolved tree.

4. Compare and contrast your two potential rooted phylogenies. What is one evolutionary conclusion that is quite different between the two?

6. (8 points) On an astrobiology voyage in the year 3031, you return to the ocean planet from problem #2. After a painstaking expedition that collected and described 5 potential species (named A-E, sampled randomly from potentially millions of undescribed species), you collected the following data on five different traits. These are all binary traits, where things are either present or absent: venom, sentience, tentacles, flight, a single (humongous) eye.

Added by Carol M.

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