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biology

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How did the primordial atmosphere, photosynthesis, oxygen, the ozone layer, and the endosymbiotic theory influence the origin of living organisms?

  • biology - ,

    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.

  • biology - ,

    What is the heterotrophic hypothesis? I cannot find anything online that explains it in terms I understand.

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