During an experiment, a scientist observed prokaryotes that lived near volcanic vents deep in the ocean. The scientist MOST likely observed
A. photoautotrophs.

B. chemoautotrophs.

C. heterotrophs.

D. photoheterotrophs.

Question

During an experiment, a scientist observed prokaryotes that lived near volcanic vents deep in the ocean. The scientist MOST likely observed 
 A. photoautotrophs.  
 
 B. chemoautotrophs.  
 
 C. heterotrophs.  
 
 D. photoheterotrophs.

anonymous · Answer

B. Chemoautotrophs, cause bacteria in these regions oxidate hydrogen sulfide to sulfur. And while erruptions on the deep ground of the ocean, much hydrogen sulfide is set free. They use the energy which is set free by the process of oxidation.