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.
A continuously variable automatic transmission, or CVT, uses pulleys and a belt to automatically and seamlessly change gear ratios to maintain engine speed in an optimum range.In contrast, a conventional automatic transmission has a fixed number of gears, from four to as many as seven or eight.ith some transmission/engine combinations, the changes in engine speed can be dramatic with each shift, and the shifts can be slow or abrupt. A CVT changes gear ratios in a linear fashion based on engine speed, so you probably will never notice it changing gears.