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.
Chronic venous insufficiency or CVI is a medical condition where the veins cannot pump enough blood back to the heart.The most common cause of CVI is superficial venous reflux which is a treatable condition.As functional venous valves are required to provide for efficient blood return from the lower extremities, this condition typically affects the legs.he most common cause of CVI is superficial venous reflux which is a treatable condition. As functional venous valves are required to provide for efficient blood return from the lower extremities, this condition typically affects the legs.