What is the best definition of a eukaryotic cell?
has an internal structure consisting of a membrane–bound nucleus and membrane–bound organelles
has an internal structure with the genetic material in the form of a nucleoid
has an internal structure with no membrane–bound organelles

Has an internal structure consisting of a membrane–bound nucleus and membrane–bound organelles

Explanation:

Eukaryotic cells are those that have a nucleus delimited by a nuclear envelope. In this cellular type, the genetic material is not spread through the cytoplasm, as in the prokaryotic cells, but, rather, restricted to the nucleus region. Within the cytoplasm of the eukaryotic cell are immersed several membranous organelles that present the most diverse functions.

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explanation:

the church governed the society after the empire fell.   constantine took charge of rome and ended the confusion which had over religion and made christianity as the only religion and that started ruling the roman empire. he also divided the empire into two and fortified the eastern part.   he ruled the eastern part.