BIOL 1F25 Final: BIOL 1p92 previous exam 2013
10 Apr 2019
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Instructions: write your name and id in the spaces provided on the exam script. There are four (4) parts to the exam. Multiple choice (70 marks) please answer on the scantron sheet provided. Choose the most correct answer and explanation: no, if they are a clade then you have to assume that they have the same common ancestor, no. They can have many common ancestors, depending on how far back you go in the tree. They cannot have more than one most recent common ancestor: maybe. Only a paraphyletic clade would have more than one common ancestor: yes. For example, dogs and cats have a common ancestor that gave rise to mammals, and an older common ancestor that gave rise to vertebrates. The most recent common ancestor is the point at which two species diverged from each other: yes. If they are related then they must have common ancestors all along the way.
