The sizes of horns in males of a particular beetle have an interesting distribution: the highest frequencies are around 15 millimeters and 30 millimeters,with few individuals in between.Based on this observation,which evolutionary process is most likely to be operating on these horns?
A) Stabilizing selection
B) Directional selection
C) Genetic drift
D) Disruptive selection
E) Mutation

Question

Quizplus · Accepted Answer

The bimodal distribution of horn sizes suggests disruptive selection, where individuals with either small or large horns have a selective advantage over those with intermediate sizes. This can lead to the emergence of two distinct morphs within a population.

The Sizes of Horns in Males of a Particular Beetle