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when analysts in western cultures use the word fundamentalism in connection with the middle east, they primarily mean the islamic reaffirmation of religious values in (select only one answer): more than one answer.

a political system
the church
marital
society
the world

If it is one answer than the answer is:

A political system

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.