THE NATS 104 Assigned Readings for Lecture 13 include 

Volpe, E.P. and Rosenbaum P.A., "Undertanding Evolution" 6th ed., McGraw-Hill (2000)	
p. 185-202. 

These are available online as PDF files (URL and password have been
announced in class)
Here's what to do
  - Log On
  - Select Our Class (NATS104 section 12)
  - Enter the PASSWORD that was given in class