Mutagen is a chemical or physical agent which is capable enough to change the genetic make up of the organism hence, result in mutation. The mutagen can be in the form of radiation such as X-rays, UV rays, heat or chemical substances. The carcinogens are the chemical substances which are capable of causing mutations which are responsible for cancer.
<span>In the middle archaeologists have uncovered many early human communities which were lost to time many ages ago, of these communities two notable ones are the Jericho and Catal Huyuk.</span>
