Mutation is a change in DNA, the hereditary material of life. An organism's DNA affects how it looks, how it behaves, and its physiology  all aspects of its life. So a change in an organism's DNA can cause changes in all aspects of its life.
continuously variable transmission (CVT)=An automatic transmission that can change seamlessly through an infinite number of effective gear ratios between maximum and minimum values. Automatic transmission= Automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually.
The Technical Side of the Continuously Variable Transmission(CVT) Belt type CVT transmission have really been around for ever. In fact, my 1981 Arctic Cat, Snow Mobile had a continuously variable transmission that operated on the very same principle as the one in our new 2013 Subaru, XV Crosstrek.