Why did the number of american corporations begin to increase in the 1830s

Because corporations encountered a more propitious legal system that allow them to grow. Corporations started to have rights that they didn't have before. For example: In Trustees of Darmouth College v. Woodward , this bill basically stated corporate charters inviolable.  In Bank of the USA v. Deveaux , this bill allow Banks to sue.  The 1830s was the decade in which the USA moved to the west and many entreprenurs made money and companies grew at a corporate level.

mohenjo-daro is located west of the indus river in larkana district

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.