facultative

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facultative

empowering but not compelling the doing of an act.
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References in periodicals archive ?
Alarm signaling in a facultatively social mammal, the southern Amazon red squirrel Sciurus spadiceus.
These complex interactions suggest that life cycle evolution in facultatively paedomorphic salamanders is influenced by the variation in life history pressures experienced by males and females.
boskianus in the UAE or whether, perhaps, in the context of the relatively unpredictable UAE rainfall regime, the breeding period can be shifted facultatively to take advantage of unseasonably clement conditions.
Listeria monocytogenes is a Gram-positive bacillus which is facultatively anaerobic and non-spore-forming.
marcescens are pathogens of plants, sharing many characteristic as being rod shaped, Gram negative, non-spore forming and facultatively anaerobic among others.
Concentration and species composition of aerobic and facultatively anaerobic bacteria released to the air of a dental operation area before and after disinfection of dental unit waterlines.
Reidentification of facultatively alkalophilic Bacillus sp.
The oral prevalence of aerobic and facultatively anaerobic gram-negative rods and yeasts in Hong Kong Chinese.
Relationships between stomatal traits and habit, habitat and ecosystem: Natural selection favors those individuals that facultatively adjust their phenotypes to the conditions in which they live (Stearns 1992).

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