Answer: Mutagens are chemical or physical factors that increase the rate of mutation.
Step-by-step explanation:
A mutation is a change that occurs in the genetic make up of the organism. A mutagen is a chemical or physical agent which is capable of causing changes in the genetic material of the organism typically in DNA. They are expected to increase the rate of mutations. Generally the mutagens like radiations and chemicals are carcinogenic. These mutagens result in chromosomal instability, rearrangement of the chromosomes, deletion, inversion and translocation and chromosomal breakage.