Are these questions true or false... A woman who lost her wedding ring found it 16 years later on a carrot in her garden.
A man once lived without food or water for a whole year.
One-quarter of all your bones are located in your feet.
And The Wizard of Oz was the first movie with color and the first with sound.

I'm thinking true; not sure, True, True, False

Explanation:

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.

the noble might have thought that the system was far because they had lot of things and riches and the serf would have thought that the feudal system was un fair because of the way they were treated.