Which of the following would have resulted from the functions of prokaryotes on early earth? earth's oceans grew larger less oxygen gas became present in the atmosphere less carbon became present in earth's soil more oxygen gas became present in the atmosphere

The correct answer is 'more oxygen gas became present in the atmosphere'. Early prokaryotes were photosynthetic organisms; they used energy from the sun along with carbon dioxide to manufacture food. A known byproduct of this reaction is the release of oxygen. Over millions of years the concentration of oxygen built up in the atmosphere. Cyanobacteria are examples of such organisms. 
 

Volcanoes make new rocks so not ahotspots are the the stuff that makes volcanoes mid atlantic ridge(mar cause i’m lazy) is a constructive plate boundary so it makes sense that new rocks would be found near it, also the mar is in the middle of the ocean so it fits the description deep ocean trench, umm, there’s no ocean trenches to where you’re goingso the mar is most likely the answeri wouldn’t trust me but hey why not