Microevolution may happen: 1. When macroevolution occurs re…

Micrоevоlutiоn mаy hаppen: 1. When mаcroevolution occurs repeatedly over a long period of time and leads to the creation of a new species.2. As a result of a major environmental change, such as a volcanic eruption, earthquake, or an asteroid hitting Earth, which changes the environment so much that natural selection leads to large changes in the traits of a species.