How did some formerly enslaved african americans in the south respond to advancing union forces

They served as scouts and spies for the union

The correct answer is African Americans served as scouts and spies for the Union.

During Civil War African Americans often played the role of spies, according to William Stroke’s Account of his War Record over 90% of the Union War Force consisted of African Americans. They could not be in the battlefield because of lack of experience and poor training but they worked behind the scenes as scouts, raiders or spies, they provided the Union advantages.

yes they have. but is this a true false question? if it is, the answer is true.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.