Assertion: sulfur bacteria | /r/HasProperty | photoheterotroph
Facets:
value: in the absence of oxygen
type: TEMPORAL
Source sentences:
text: For example, many purple non-sulphur bacteria are photoheterotrophs in the absence of oxygen but become chemoheterotrophs in the presence of oxygen.
text: For example, many purple non-sulphur bacteria are photoheterotrophs in the absence of oxygen but become chemoheterotrophs in the presence of oxygen.