Question

Organisms most likely to be found in extreme environments are ________.

a. fungi

b. bacteria

c. viruses

d. archaea

Short answer

The organisms most likely found in extreme environments are bacteria.

Step-by-step solution

Explanation

The prokaryotes which include the bacteria and archaea both have thick cell walls and hence they are able to resist extreme environments like high salt concentration, extreme hot or cold environments, etc. The most likely which will found in extreme environments are bacteria. Viruses are acellular with no cell wall and hence can't resist the external extreme environments. Fungi are again the organisms which may be found in extreme environments but most likely are bacteria.

Final answer

Hence, the correct option is 'b'.