Final answer:
Mutations in DNA sequences are random occurrences that lead to genetic diversity, providing raw material for natural selection.
Explanation:
Mutations are random occurrences in DNA sequences that can result in genetic variations within populations. These mutations can be beneficial, neutral, or harmful, and they are not influenced by the needs of the organism.
Spontaneous mutations happen unpredictably in response to internal or environmental factors, and their exact causes are often unknown. The rate of mutation varies, with some occurring at a higher frequency in rapidly reproducing organisms like viruses and bacteria.
Genetic diversity resulting from Mutations and sexual reproduction serves as the raw material for natural selection, driving evolution by enabling organisms to adapt to changing environments.
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