Question

A scientist collected a sample of microorganisms from an extremely hot, thermal deep-sea vent. With a microscope, the scientist observed that the microorganisms were single-celled prokaryotes that can metabolize gas. Under which domain would you classify these microorganisms?

A. Bacteria
B. Archaea
C. Eukarya
D. Fungi

Answer 1

B. Archaea

Archaea are a group of micro-organisms that are similar to, but evolutionarily distinct from bacteria.

Many archaea have been found living in extreme environments, for example at high pressures, salt concentrations or temperatures.