Questions to consider as you read Origins, Chapter 15 (The Origin of Life on Earth), and review the NOVA website history of life on earth:

  1. What are the defining characteristics of Life on Earth?
  2. Using both the reading and the website: What are the major events in the history of life, and why was each important for subsequent life evolution?  
  3. What are the major hyotheses for where and how life originated?  Is there a consensus on which is right?  What is the main uncertainty with all of them?


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