After asking students during a lesson on mutations if it is possible that a mutation in DNA could be good, most students will nod yes without much understanding.  Recently, I finally had one student raise his hand immediately and answer the question (with extreme surprise that no other students were blurting out the answer)…”evolution!”   He was able to make the connection between changes in DNA that are building up over time, and how that change can possibly make that organism better in some way.  If it helps the survival of an organism, that mutation is going to stick around and More >