Major Evolutionary Changes in Early Cellular Life, biology homework help

Chapter 19 discusses Major Evolutionary Changes in Early Cellular Life.With regard to this concept, answer the following questions.

1. What evidence supports the idea that organic molecules (protein, ATP, fats, etc.) were formed from inorganic molecules (Nitrogen, Hydrogen, water, carbon dioxide, etc.)
2. What evidence supports the theory that eukaryotic cells arose from the development of an endosymbiotic relationship between primitive prokaryotic cells?
3. What organisms were probably responsible for the development of an oxygen-containing atmosphere?

More information:

1. Brief History of Life
   
2. On the Origin of Life