A population of pigs lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive more frequently than those with shorter snouts. Over time, most of the pig population is made up of individuals that have very long snouts. This is an example of which type of selection?
A. directional selection
B. disruptive selection
C. stabilizing selection
D. ecosystem selection
Answer (2)
The situation indicates that pigs with longer snouts survive better, showcasing directional selection, where traits shift towards one extreme. Over time, this leads to a population dominated by long-snouted pigs. Directional selection contrasts with other types like stabilizing and disruptive selection. ;
The scenario describes directional selection, where pigs with longer snouts survive better and reproduce more than those with shorter snouts. This leads to an increasing proportion of the population having long snouts. Thus, the correct answer is A. directional selection.
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