Organisms in population A, have no genetic variations, and organisms of population B, have genetic variations. Based on this information, choose the correct statement.
Population A is more stable than population B.
Population B is more stable than population A.
Both population A and population B are stable.
Stability cannot be determined from the presence or absence of variations.
A
Population A is more stable than population B.
B
Population B is more stable than population A.
C
Stability cannot be determined from the presence or absence of variations.
D
Both population A and population B are stable.
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Solution
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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.
Thus, the correct answer is option B.
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