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.
An implanted venous access port is a device used to give treatments and take blood. It may also be called a central venous access device (CVAD). The port is a small container that is placed under your skin, usually in your upper chest. A port can also be placed in your arm or abdomen. The port is attached to a catheter that enters a large vein.