NESA Biology Mutation

Gene flow refers to the transfer of genetic material between different populations through migration, which is not what occurred here.

Genetic drift is the change in allele frequencies due to random chance events. A storm randomly killing a large portion of the population is an example of the bottleneck effect, a specific type of genetic drift.

Natural selection occurs when individuals with advantageous traits survive and reproduce at higher rates. The prompt specifies the frogs were killed randomly, meaning survival was not based on specific traits.

Survival of the fittest is a term often used to describe natural selection, where survival depends on having traits best suited to the environment. Since the deaths were random, this does not apply.

Incorrect. Biochemical mutagens involve specific biological molecules or metabolic processes, whereas UV light is a form of physical radiation.

Incorrect. Biological mutagens consist of living or viral agents, such as certain bacteria or viruses, rather than physical energy sources like UV light.

Incorrect. Chemical mutagens are chemical compounds, such as alkylating agents or base analogs, that alter DNA structure. UV light is a physical energy source, not a chemical substance.

Correct. UV light is a form of non-ionizing electromagnetic radiation that acts as a physical mutagen by inducing the formation of pyrimidine dimers in DNA.