Questions on the classification of biological organisms, and the methods used for classifying them.

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Is there a classification of species based on number of different cell types?

The human body has around 200 different types of cells, according to my brief internet research. How does that compare to other species? Is there a classification of species based on that, i.e. number ...
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What observations would confirm or refute that an Nanobe is a living organism?

No conclusive evidence exists that Nanobe structures are, or are not, living organisms, so their classification is controversial. What observations would confirm or refute that an Nanobe is a living ...