What event marked the official end of the Civil War?

The Free Soil Party was primarily opposed to:

How did the Supreme Court’s ruling in the Dred Scott case impact the political landscape in the U.S.?

Which demographic group significantly contributed to the war efforts and the eventual changing perspectives on slavery during the Civil War?

What was the main consequence of the Dred Scott decision?

What legislation was passed in 1850 in an attempt to address tensions regarding slavery?

Where do nicotine’s rewarding effects originate before spreading to other brain regions? 

During nicotine withdrawal, which change in nicotinic receptors is most linked to increased craving and risk of relapse?

A college student reports using nicotine gum to stay focused during final exams. She notes improved concentration and memory while studying, especially after chewing a piece of nicotine gum. She has no prior history of nicotine use. Which mechanism best explains the student’s reported cognitive enhancement? 

By what percentage did the production of cotton increase in the United States between 1800 and 1850?