What mechanism of evolution occurs when individuals move in or out of a population?Group of answer choicesmutationgene flownatural selectiongenetic drift

The mechanism of evolution that occurs when individuals move in or out of a population is known as gene flow.

Explanation:

1. Gene Flow refers to the transfer of genetic material between populations, which can happen when individuals migrate (move into a new population) or emigrate (leave their native population). This process can introduce new alleles into a population or change the frequency of existing alleles.

2. The other options mentioned:

   • Mutation is the process of changes in the DNA sequence, leading to new traits, but it does not specifically involve movement of individuals.
   • Natural Selection is the process where individuals with favorable traits are more likely to reproduce, leading to evolutionary changes over time, independent of migration.
   • Genetic Drift involves random changes in allele frequencies within a population, especially in small populations, and is not directly tied to movement.

In summary, when individuals migrate in or out of a population, it alters the genetic composition of that population through gene flow.