The Differential Distribution of Wing Length in Drosophila, with Larger

Multiple Choice

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.