The Louisiana Purchase proved to be one of the shrewdest business pacts in the entire history of the United States. The purchase doubled in the area of the country and provided
territory from which fourteen new states were created either wholly or in part. It also gave
us control over the mouth of the Mississippi River and opened up the way to foreign trade.
Prior to the purchase, the waterway had been blocked by the Spanish, probably with the
approval of Napoleon. The land that was bought was rich in timber, minerals, and natural
resources of many kinds. Finally, the cost of the transaction was unbelievably low; the
total of S15 million amounted to about four cents an acre.
a. The Louisiana Purchase was a very good business deal for the U. S.
b. The land bought by the Louisiana Purchase was rich in mineral
c. The land bought by the Louisiana Purchase was very chcap.
d. Most Americans were very pleased with the purchase.

christopher columbus (1492–1504)

the reform movements that arose during the antebellum period in america focused on specific issues: temperance, abolishing imprisonment for debt, pacifism, antislavery, abolishing capital punishment, amelioration of prison conditions (with prison's purpose reconceived as rehabilitation rather than punishment), the humane treatment of animals, the humane and just treatment of native americans, the establishment of public institutions for the care of the destitute, orphans, blind, and mentally ill, the establishment of public schools, the abolition of tobacco use, vegetarianism, health reform, homeopathic medicine, woman's rights (including, at first, especially the establishment of a woman's right to own property apart from her husband and her right to sue for divorce), and the amelioration of labor conditions (including higher pay, the right to form unions, the right to strike, and the demand for limits on the number of work hours, and safe working conditions).

explanation:

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.

i see, would you mind putting it as one?