Optiоnаl extrа credit: Think bаck оver everything yоu learned in this course. Relax, and pick any one topic and explain this topic thoroughly and fully. This is your chance to demonstrate your thorough knowledge of a single topic of your choice from this course! If it helps in writing this, pretend you are explaining this concept to a friend who knows very little about microbiology. As an example, you might explain how bacteria like E. coli have evolved to so exquisitely regulate gene expression, and why. Or you might explain how a single strain of E. coli might have just 50% of its genes in common with another strain of E. coli, and why both are still considered part of the same species. Or you might explain why worldwide, millions of people still die each year from preventable infectious diseases. The choice of topic is yours, but please pick something you can explain thoroughly and clearly, demonstrating your good knowledge of this topic! Please choose a single topic and explain it in a minimum of two paragraphs using complete sentences! Copyright 2025 by Dr. Jonathan A. Miller. All rights reserved. Online sharing or distribution is prohibited. For exam use only in BIOL& 260: Microbiology at Edmonds College. Outside help is not allowed.