The long, thin beak of the hummingbird fits inside the tube formed by the flower petals. For this reason, the hummingbird is able to sip nectar from the flower, while other animals cannot reach the nectar. The evoluion if the hummingbird beak and the tube shaped flower petals is an example of which macroevolutionary pattern A. Convergent evolution, because the traits evolved separately from one another

B. Adaptive radiation, because both traits evolved from a common ancestor

C. Coevolution, because each trait evolved in response to the other trait

D. Punctuated equilibrium, because each trait evolved at the same rate