While blizzards often feature extreme cold and heavy snow, there are actually no temperature or snow depth requirements for a storm to qualify as a blizzard. Occasionally, blizzard conditions will present when there is no precipitation.
Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.efinition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
Intensity means the amount of radiation in an area. Exposure means the length of time that the radiation that is present. Low intensity radiation can cause small changes to the DNA which may alter the cell without killing it. A change in the DNA of a cell is called a mutation.Some mutations are harmless and make no difference to the organism, some may be beneficial (good), and some may be harmful.ntensity means the amount of radiation in an area. Exposure means the length of time that the radiation that is present. Low intensity radiation can cause small changes to the DNA which may alter the cell without killing it. A change in the DNA of a cell is called a mutation.