AP Biology Name __________________________
Guided Reading Chapter 25
This chapter can be a bit difficult as we are extending and learning new ways to view classification. There are those who see the future of taxonomy abandoning the kingdom – phylum – class, etc. system altogether. This chapter introduces classifications with a greater understanding of molecular biology. A study tip is in learning the vocabulary at the inception of the unit.
1. Use the following blank diagram to compare and explain monophyletic, paraphyletic and polyphyletic – include the definition of each term in your diagram

2. What is the difference in the meaning between the lengths of lines in a phylogram and ultrametric tree?

3. Look up the term parsimony in the dictionary and write its definition here

4. How is this applied to understanding evolution – what is the principle of maximum parsimony and the principle of maximum likelihood?

5. What is the difference between orthologous genes and paralogous genes?

6. What is the concept of a molecular clock and how is it useful?

7. What domains have been agreed upon?