Iwould appreciate it if someone can answer all the questions

#2 A member of the highest Hindu caste, that of the priesthood.

#3 The first major religion is Hinduism

#4 According to historians, the origin of Hinduism dates back to 5,000 years or more. At one time, it was believed that the basic tenets of Hinduism were brought to India by the Aryans who invaded the Indus Valley civilization and settled along the banks of the Indus river about 1600 BCE.

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.