What is a cabinet and how people consist of it

It's a bunch of people who advise the President on what to do. They head different departments. There are 15 of them.

Explanation:

Every one of them has a title, like the Secretary of Defense, the Secretary of Education, etc. The person in charge of the Justice department is called the Attorney General.

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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.