A scientist is examining a single-celled organism with no nucleus that can be found in extreme environments. What kingdom does this organism belong to?
A. Animalia
B. Archaebacteria
C. Eubacteria
D. Protista
Archaebacteria are single cell organisms which can survive in extreme environments. They can be found in very hot, very cold or very salty environments. Some of them survive only in a methane atmosphere.
