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.
CVT is available in the Honda Civic, Honda Jazz Hybrid, Honda Insight and Honda CRZ replacing the conventional 'automatic' transmission. CVT fully complements these low emission engines. The transmission automatically selects a gear which is nearest to the current road speed.