Answer:
The last one and the first one.
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Explanation:
Answer:B.
It was used to prove that smoking causes health problems.
Explanation:
Answer: B: Mutation increase variety in a population.
Explanation:Mutations are changes to an organism's DNA and are an important driver of diversity in populations. Species evolve because of the accumulation of mutations that occur over time. This mutation has introduce a new allele into the population that increases genetic variation and may be passed on to the next generation.
