facultative
Related Words
optionaldiscretionaryvoluntaryelectiveobligatorymandatorycompulsoryobligatefacultychoiceoptionpreferenceadaptationbiologyanaerobeaerobemetabolismrespirationoxygenenzymeorganismbacteriamutationevolutionplasticityflexibilitycapabilitypotentialpowercapacitydiscretionvolitionwillpermissionprivilegecontingencyconditionalvariablealternativeselectiondecisiondeterminationphysiologybiochemistrymicrobiologyecologyenvironmenthabitatsurvivalstressresponsemechanismpathwaysubstratecatalystfermentationoxidationglucoseenergymetabolitehomeostasisregulationcontrolswitchtriggerinductionrepression