Futuyma and colleagues (1995)used the herbivorous leaf beetles of the genus Ophraella to study constraints in genetic diversity.Ophraella beetles feed and lay eggs on only certain members of the sunflower family because the beetles are unable to ________.

A) penetrate the epidermal layer to lay eggs on nonhost plants
B) detect and detoxify chemical defenses produced by nonhost plants
C) digest the leaves of nonhost plants
D) break down the chemical defenses produced by nonhost plants in response to predation by the beetles