What region of a prokaryotic gene is analogous to the enhancer region of a eukaryotic gene?

Question

Also....
Mutations may occur in gametes or in body cells. In which cell type is a mutation likely to be a source of genetic variation for evolution, why?

Answer 1

Promoter region (see wiki, below)

Question 2. Answer this yourself. Which type of cell, somatic or gamete, is inherited? That is the only cell in which mutation is important.

Answer 2

Eukaryotic genes all have Introns, in bacteria and archaea bacteria it is uncommon. also bacteria lack histones linked with DNA, in Eukarya and Archaea bacteria histones are presnt. besides the undeniable fact that the most important large difference is that bacteria and Archaea bacteria's chromosomes are round.