The nuclei of eukaryotic cells are characterized by

a) one or more nucleoids.
b) all of these.
c) a single-layered membrane.
d) a double membrane.
e) a non-porous membrane.



Answer :

Final answer:

Eukaryotic cell nuclei are surrounded by a double membrane called the nuclear envelope and regulated by nuclear pores.


Explanation:

The nuclei of eukaryotic cells are characterized by being surrounded by a double membrane known as the nuclear envelope, consisting of two lipid bilayers, which regulate the transport of materials in and out of the nucleus through nuclear pores. This feature is unique to eukaryotic cells and is essential in defining them.


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