Chapter 01 – The Science of Biology
54. The common ancestor that produced the most evolutionary recent derived characters is
Clarify Question
• What is the key concept addressed by the question? The question is about interpreting
phylogenetic trees.
• What type of thinking is required? This question is asking for you to apply the principles
of a phylogenetic tree to infer relatedness.
• What key words does the question contain and what do they mean?
Gather Content
• What do you know about relatedness based on a phylogenetic tree?How does it relate to
Consider Possibilities
• What other information is related to the question? Which information is most useful?
Choose Answer
• Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?R and D have the most recent common ancestor and this
ancestor is indicated by branchpoint 6.
Reflect on Process
• Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?