The differential distribution of wing length in Drosophila, with larger wings in northern areas and smaller wings in southern climates, provides evidence that:
A) chance is the most important agent in evolutionary change.
B) natural selection is the most important agent in evolutionary change.
C) wing length is not a heritable trait.
D) the fossil record is usually inaccurate.
E) the molecular clock cannot be applied to fruit fly traits.

Question

Quizplus · Accepted Answer

The variation in wing length in different climates suggests that natural selection is acting on this trait, favoring larger wings in northern areas and smaller wings in southern climates, indicating adaptation to environmental conditions.

The Differential Distribution of Wing Length in Drosophila, with Larger