Final answer:
Mass extinctions can cause well-adapted species to go extinct.
Step-by-step explanation:
True, mass extinctions can cause many species that are well-adapted to their environment to go extinct. When the environment undergoes significant changes, species may not have the necessary traits to survive in the new conditions. This leads to the survival of only those individuals with the traits needed to live in the changed environment, resulting in the extinction of species that were previously well-adapted.