Open Door Notes to imperialist nations were about

The notes were letters addressed to the leaders of imperialist nations proposing that the nations share their trading rights with the United States, thus creating an open door. This meant that no single nation would have a monopoly on trade with any part of China.

Explanation:

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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.