Zoology 10th Edition by Stephen Miller,John Harley

Exercise 1

A community of ground nesting birds and lizards experiences an environmental change that expands the area of arid habitat favored by the lizards and that is less usable by the birds for nesting. Which of the following scenarios would be most likely for this community?
A) Directional selection could result in an increased prevalence of alleles that promote drought tolerance in the birds.
B) Disruptive selection could result in the formation of two species of birds.
C) Stabilizing selection could promote the formation of two species of lizards.
D) Directional selection could promote the formation of two species of lizards.