The leaders of which three countries were known as the "big three" during world war ii?
a. germany, italy, and japan
b. united states, united kingdom, and soviet union
c. united kingdom, france, and germany
d. united states, canada, and mexico

B. United States, United Kingdom, and Soviet Union.

Explanation:

These were the strongest Allied countries fighting against the Axis Powers (Germany, Japan and Italy). F.D. Roosevelt was the president of the USA, Winston Churchill was the British prime minister, and Joseph Stalin was the paramount Soviet leader.

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.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.