Which statement regarding mutations is true?
a. Mutations in the DNA sequence occur on a regular basis.
b. Mutagens are a result of a mutation.
c. Environmental factors can be linked to many mutations.
d. Spontaneous mutations occur because of environmental exposure.
ANS: C
A large number of agents are known to cause mutations. These mutations are attributed to known environmental causes. DNA replication is very accurate, thus, mutations do not occur on a regular basis. Mutagens are the factors that cause mutations. Spontaneous mutations occur naturally dur-ing DNA replication.
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