Genetic drift happens by chance and can make an allele disappear completely from a gene pool, even if it was a desirable trait that should have been passed down to offspring. The random sampling style of genetic drift shrinks the gene pool and therefore alters the frequency the alleles are found in the population.
The answer is B. By polluting near by streams with pesticides and herbicides
Mammal? Is this for science or?
A. Smallpox could make a good biological weapon because it is an airborne virus.
B. Smallpox can be prevented via vaccination and potentially prevented by HEPA filters.
