Organisms in population A, have no genetic variations, and organisms of population B, have genetic variations. Based on this information, choose the correct statement.
A
Population A is more stable than population B.
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B
Population B is more stable than population A.
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C
Both population A and population B are stable.
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D
Stability cannot be determined from the presence or absence of variations.
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Solution
The correct option is B Population B is more stable than population A. Population B is more stable than population A. Variation allows some individuals within a population to adapt to the changing environment. Because natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation. Some new alleles increase an organism’s ability to survive and reproduce, which then ensures the survival of the allele in the population.