posted by Serena on .
How did the primordial atmosphere, photosynthesis, oxygen, the ozone layer, and the endosymbiotic theory influence the origin of living organisms?
Caitlin, Serena, Kal, Rach, or whoever,
Please note that we don't do students' homework for them. Be sure to go back into your textbook or use a good search engine. http://hanlib.sou.edu/searchtools/
Once YOU have come up with attempted answers to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to comment on your thinking.
What is the heterotrophic hypothesis? I cannot find anything online that explains it in terms I understand.