Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Unlike ammonia, oxygen cannot be liquefied at room temperature because its critical temperature is below room temperature.
[A]: Unlike ammonia, oxygen cannot be liquefied at room temperature because its what is below room temperature?


[Q]: Once a plant cell becomes specialized, divide can they no longer do.
[A]: Once a plant cell becomes specialized, what can they no longer do?


[Q]: We call the microflora that aid in the digestion process intestinal flora.
[A]:
What do we call the microflora that aid in the digestion process?