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Among the given scenarios, which option represents the most accurate example of disruptive selection occurring within a population?
While heterozygous pink flowers face negative selection pressure, both homozygous red and homozygous white flowers experience positive selection.
The presence of pollution-induced turbidity in a lake leads to increased reproductive success for brighter fish, causing the population to exhibit a higher average level of brightness.
Oak trees with medium-sized leaves are favored by evolution due to the disadvantages associated with large leaves and the insufficient sunlight received by small leaves.
The construction of a large road divides a population of snakes, resulting in the emergence of separate species through speciation.
Answers (1)
Option 1 is an example of disruptive selection, where the pink flowers with heterozygous traits face lower fitness compared to the red and white flowers with homozygous traits. Disruptive selection occurs when extreme traits have higher fitness, leading to the divergence of a population into distinct groups. In this case, the selection pressure favors the red and white flowers, resulting in a reduced presence of pink flowers. This process can contribute to speciation and the formation of new species.
Hence, the correct answer is option 1.
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