Introduction:
Adaptive radiation refers to the diversification of a single ancestral species into multiple species that occupy different ecological niches. Convergent evolution, on the other hand, occurs when unrelated species develop similar traits or characteristics due to similar environmental pressures. In certain scenarios, adaptive radiation can become an example of convergent evolution.

Explanation:
When adaptive radiation occurs in isolated geographical areas, it can lead to the development of similar traits in different lineages. This similarity in traits is not due to a common ancestor but rather due to similar selective pressures in their respective environments. This convergence of traits is an example of convergent evolution.

Example:
One example of this phenomenon is the evolution of flight in birds and bats. Birds and bats are not closely related, yet they both independently evolved the ability to fly. This convergence of the trait of flight is a result of similar selective pressures and ecological opportunities in their respective environments.

In the case of adaptive radiation, it is possible for multiple instances of diversification to occur simultaneously in different geographical areas. Each instance of adaptive radiation results in the development of new species that are adapted to their specific ecological niches. If these different instances of adaptive radiation in isolated geographical areas lead to the evolution of similar traits or adaptations, it can be considered an example of convergent evolution.

Conclusion:
In conclusion, adaptive radiation can become an example of convergent evolution when it occurs in isolated geographical areas and leads to the development of similar traits in different lineages. This convergence of traits is a result of similar selective pressures and ecological opportunities in their respective environments.