Which Example Describes Microevolution

Question

Which example describes microevolution?
A) Birds evolved from dinosaurs.
B) Lions and tigers evolved from a common cat-like ancestor.
C) HIV evolved resistance to antiviral medications.
D) Land plants evolved from algae.

Accepted Answer

Microevolution refers to changes in the genetic makeup of populations over time. The example given in choice C shows how HIV has evolved to become resistant to antiviral medications, which is a genetic change within a population of viruses over time. The other choices describe macroevolution, which involves larger scale evolutionary changes, such as the origin of new species or major groups of organisms.