With Few Exceptions, Hyperthermophilic Crenarchaeotes are Obligate Aerobes

Question

With few exceptions, hyperthermophilic crenarchaeotes are obligate aerobes.

Accepted Answer

Hyperthermophilic crenarchaeotes are not exclusively obligate aerobes; many are anaerobes or facultative anaerobes, capable of surviving in environments without oxygen by using alternative electron acceptors or fermentation.