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11.19.09_DiscHmwk - a(2 pts Identify the tree that shows a...

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Archaea Eukaryotic  nuclei Other  bacteria Proteobacteria Mitochondria Intro Bio 151/153 Discussion Homework; week of 11/23-11/25 Name:  Joshua Litwicki Discussion Section #:  609 1. Answer questions a–c about the phylogenetic tree  shown at left. a. (2 pts) Which of the following is more  closely related to green algae: red algae or  land plants ? Explain.  Because they share a  more closely related common ancestor . b. (2 pts) Are land plants more closely related  to chordates or mollusks? Explain.  They  are equally related. The chordates and the  mollusks share a common ancestor that is  equally related to the land plants. c. (2 pts)  True  or False? Jellyfish are more closely related to chordates than to fungi. Explain.  Jelly  fish share a common ancestor with chordates and none with fungi. 2. Answer questions a and b about the phylogenetic trees shown below.
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Unformatted text preview: a. (2 pts) Identify the tree that shows a different set of relationships between the 9 taxa than the other two trees. Circle the difference below. Tree 3 b. (2 pts) If species a–i are a group of flowering plants, assume taxa a–d have red flowers, taxa f–i have blue flowers, and taxa e has white flowers. Draw the locations of flower color changes on trees 1–3. How are the three trees similar? How are they different? 3. (2 pts) What does the tree to the right imply about the origin of mitochondria? Explain your answer. It says that mitochondria are more closely related to proteobacteria and other bacteria than eukaryotes saying that mitochondria were probably bacteria that were engulfed by others cells for beneficial reasons....
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