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koban [17]
3 years ago
14

Mutations that occur without a known cause are known as:

Biology
1 answer:
SpyIntel [72]3 years ago
4 0

Answer:

a. spontaneous mutations

Explanation:

<em>Spontaneous mutations </em>occur randomly in all cells and without any agents. <em>Induced mutations </em>are the result of some exposure to a physical or chemical agent called a mutagen. Mutations can be classified as <em>harmful and adaptive</em> regardless of whether they were spontaneous or induced mutations. The reversal mutation is when a given mutation is reversed by another mutation so that the nucleotide is changed back to its original state.

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