The first wave of european immigrants to arrive to the united states in the nineteenth century came from a. russia b. southern europe c. eastern europe d. northwestern europe

The correct option is D

The United States has been the majority destination of European immigrants. Thus, between 1815 and 1860, five million people from Europe arrived in that country, and between 1860 and 1920, another 27 million entered. Between 1840 and 1920, 6 million Germans, 4.75 million Irish, 4.5 million Italians, 4.2 million English, Welsh and Scottish emigrants, 4.2 million from the Austro-Hungarian Empire, 2.3 million from Scandinavia and 2.3 million from the Russian Empire

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 correct answer is a