The single feature that defines a eukaryote vs a prokaryote is
Aprokaryotes have ribosomes; eukaryotes do not
Bprokaryotes are larger than eukaryotes
Cprokaryotes have multiple mitochondria
Deukaryotes have a true nucleus; prokaryotes do not
Answer & Solution
Correct answer: D. eukaryotes have a true nucleus; prokaryotes do not
Membrane-bound nucleus is THE defining split. Both groups have ribosomes (smaller 70S in prokaryotes, larger 80S in eukaryotes). Eukaryotes are usually LARGER. Prokaryotes have ZERO mitochondria, not multiple.
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