What is the best definition of a eukaryotic cell?

a. has an internal structure consisting of a membrane–bound nucleus and membrane–bound organelles
b. has an internal structure with the genetic material in the form of a nucleoid
c. has an internal structure with no membrane–bound organelles

A.has an internal structure consisting of a membrane–bound nucleus and membrane–bound organelles

Explanation:

Eukaryotic cells are those cells which posses a membrane bound nucleus and other organelles are also membrane bound. The examples of the organelles are ribosomes which synthesize proteins, endoplasmic reticulum  which functions in sorting and packing of proteins, mitochondria which are responsible for the production of energy molecules called as Adenosine Triphosphates. They exhibit a well define nucleus which contains a genetic material in the form of DNA. The organisms which exhibit eukaryotic cells are protozoa, plants and animals.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects