March 6 is the 65th day of the year in the Gregorian Calendar (66th in Leap years). There are 298 days remaining.
Holidays and observances
March 5 - March 7 - February 6 - April 6 - more historical anniversaries
... classes of mutations are spontaneous mutations (often called background level) and induced mutations caused by mutagens.
Three basic types of mutations are:
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