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 get their energy from chemical reactions. they use hydrogen sulfide, sulfur and iron and ammonia as inorganic sources for fixing CO2 and so inhabit hostile places.