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Actually they can evolve, though I assume the range of evolution would be much narrower than traditional life forms, even viruses.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2848070/
Interesting.
The paper indicates the forms are specifically limited, in mice there were 15 specific forms they could take.
But still, they evolve between the forms, so yeah, they are equally alive as a digital thermometer. Now they just need to get their act together to beat a tamagotchi.