Appendixes are now know to have an important function. They provide fluid into the colon which reduced the chances of getting colon cancer.
By molars, I assume you mean wisdom teeth. Wisdom teeth are most likely due to microevolution with the human species. Our jaw has gotten smaller over time, causing the medical problem known as wisdom teeth. However, I see no way that this can be presented as a positive evolution. Smaller jaws and wisdom teeth do not contribute to survival. It's a degradation, consistent with devolution, and a cursed earth, with a perfectly designed human body slowly being degradated over time.
There are now over 600 inherited human genetic diseases. Where are the positive mutations promised by evolution?
I did mean wisdom teeth. Thanks for the clarification.