Active galaxies are believed to be in earlier stages of evolution, which is supported by their greater population at large distances. Galaxy mergers and the presence of supermassive black holes play significant roles in the evolution of active galaxies.
Step-by-step explanation:
Active galaxies are believed to be galaxies in earlier stages of evolution because they are found in greater population at large distances. Galaxies in earlier stages of evolution tend to be more active, which means they undergo significant changes and have high levels of energy production. One of the processes that contribute to the evolution of active galaxies is galaxy mergers. When galaxies of comparable size collide and coalesce (merger), it can lead to a burst of star formation and result in a starburst galaxy. Another important factor in the evolution of active galaxies is the presence of supermassive black holes in their centers, which can have major effects on the host galaxy, including shutting off star formation.