Manifest Destiny is the belief that the United States

Manifest Destiny is the belief that the U.S. was obviously destined by fate or ordained by God to conquer and occupy and govern a swath of North America from the Atlantic to the Pacific.

Explanation:

i think it was   tsar alexander ii

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.