Which answer choice best describes Microevolution? Inheritance of acquired characteristics. Evolution of micro-organisms. Change in allele frequencies within a species over time. When alleles from one population transfer to another population.

## Step 1<br />Microevolution refers to changes in allele frequencies that occur over time within a population. This is a fundamental concept in evolutionary biology.<br /><br />## Step 2<br />The other options provided do not accurately describe microevolution. The inheritance of acquired characteristics is a concept proposed by Jean-Baptiste Lamarck, which is not the same as microevolution.<br /><br />## Step 3<br />The evolution of microorganisms is a broad term that can include both micro and macroevolutionary changes. It does not specifically describe microevolution.<br /><br />## Step 4<br />The transfer of alleles from one population to another is a form of gene flow, which is a mechanism of evolution but does not define microevolution.