Question

in the video, a mnemonic is mentioned: \pro\ (in prokaryote) rhymes with
o.\ \eu\ (in eukaryote) rhymes with \do\ prokaryotic cell rhymes with
o\ eukaryotic cell rhymes with \do\ complete the following sentence stem to indicate some differences between the two cell types using the mnemonic. eukaryotes do have (a) ______________

Explanation:

Eukaryotes have a nucleus, while prokaryotes do not. The mnemonic "Eu" (in eukaryote) rhymes with "do" and implies that eukaryotes "do" have certain features like a nucleus.

Answer:

nucleus