What was the main consequence of the 1860 Presidential Election?

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

A smoker finds that certain daily activities – like drinking coffee or taking a work break – trigger a strong urge to smoke, even when they’ve recently had a cigarette. This phenomenon is best explained by: 

A pharmacologist is testing a novel compound that selectively activates nicotinic receptors in the basal forebrain. Which of the following conditions might this compound be most promising for? 

A patient is given a drug that blocks nicotinic acetylcholine receptors at the neuromuscular junction. What immediate effect would you expect? 

What was a key argument used by proponents of Manifest Destiny?

What was a significant motivation for American westward expansion in the 1840s?

The introduction of the revolutionized the processing of cotton and significantly boosted production.

Which invention significantly increased cotton production by making it easier to separate seeds from cotton fibers?

What impact did the completion of the transcontinental railroad have on westward expansion?