Question

this graph shows the color intensity of feathers for blue birds in the southern appalachian mountains in the years 1900 and 2000. these fictional data provide an example of which type of selection? graph: x - axis: bird feather color (pale, medium, bright); y - axis: percent of birds; 1900 (blue): pale ~5, medium ~95, bright ~5; 2000 (orange): pale ~45, medium ~5, bright ~45. options: stabilizing, directional, disruptive

Explanation:

Disruptive selection favors extreme phenotypes (pale and bright here) over intermediate (medium). In 1900, medium was dominant; in 2000, pale and bright increased, medium decreased—matching disruptive selection.

Answer:

disruptive