10. Examine the phylogenetic tree, which shows the relationships among four
groups.
a. Which two groups are the most closely related? How do you know? (4
points)
B. What is one comparison you can make about dogs, bears, and seals in terms of their common ancestors?
C. How have classification systems changed over time?
D. Describe the hierarchical level that was most recently added to the modern classification system. Then describe at least one way in which Bacteria and Archaea are different.