Answer: Genetic drift may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to 100% frequency, of other alleles.Once it begins, genetic drift will continue until the involved allele is either lost by a population or is the only allele present at a particular gene locus within a population. ... Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool.
Explanation:
I think the answer is naturally acquired active immunity..also depends on which disease
Answer:
1. the answer is sedimentary
2. The answer is lgneous
3. The answer is lgneous
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