Before photosynthesis evolved, was rare in earths atmospherer

In this experiment you were asked to present three possible mechanisms. describe those mechanisms here and include drawings of those mechanisms. how will the bromination of trans-cinnamic acid and trans-stilbene allow you to distinguish between the three possibilities? what would you expect to find in your data in each scenario?

What is the main fuel source for the work of the cell

What can happen to an enzyme as tempature rises