Contrast the method used by prokaryotes versus eukaryotes in coordinating the expression of related genes.
a) Prokaryotes rely on transcription factors; eukaryotes use operons.
b) Prokaryotes use operons; eukaryotes rely on transcription factors.
c) Both prokaryotes and eukaryotes use operons.
d) Both prokaryotes and eukaryotes rely on transcription factors.