Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar, and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an

Multiple Choice
aerobe.
anaerobe.
facultative anaerobe.
microaerophile.
capnophile.