Transformation is the genetic alteration of a cell resulting from the direct uptake of incorporation of exogenous genetic material from its surrounding through the cell membrane.
Answer:
Environmental exposure to certain chemicals, ultraviolet radiation, or other external factors can also cause DNA to change. These external agents of genetic change are called mutagens.
The correct answer is chromosomal mutations
Enzyme inhibitors reduce the rate of an enzyme catalysed reaction...this effect may be very tightly controlled, since uncontrolled reactions can be fatal.