Microevolution involves small-scale changes in a population's genetic makeup, driven by mechanisms such as mutation, natural selection, gene flow, and genetic drift. While mutations occur randomly, the subsequent survival and propagation of those mutations depend on environmental pressures and natural selection, which are non-random processes favoring beneficial traits. This means that while a mutation might arise by chance, its potential to save a species facing extinction is contingent upon whether it provides a survival advantage in the specific context of the species' environment. Thus, while the initial occurrence of a mutation is random, its impact on species survival is influenced by selective pressures.
Copyright © 2026 eLLeNow.com All Rights Reserved.