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. prokaryotes have no ______

Explanation:

Prokaryotes are simple - celled organisms without a nucleus. The mnemonic "Pro" rhyming with "no" can be used to remember that prokaryotes have no nucleus.

Answer:

nucleus