What characteristic do all members of eukarya have that members of eubacteria do not have?

The best answer would be:

A membrane bound nucleus

Here is more about the question:

There are three domains in the classification of organisms and they are Eubacteria, Archaea, and Eukarya. What makes Eukarya different from the other two is the presence of a nucleus in the cells. Among the remaining two, Archaea is more closely related to Eukarya than Eubacteria.  

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explanation:

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