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.  

your answer is rna to the question.

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )