According to interference theory, why does forgetting occur?

Neurogenesis is the process by which our brains

Teens learning new slang terms from each other is a form of ________ transmission.

Lectures indicated that to qualify as a planter in the Old South, one had to own fifty or more slaves.  Lectures also noted that nearly all free southerners were planters.

A number of future Civil War soldiers and leaders fought in the Mexican-American War. 

Here’s the preamble of the Constitution of the Confederate States of America (the nation formed by the South after secession).  Given what we know about United States history since the nation’s earliest days, what about this statement should have alarmed southerners?   “We, the people of the Confederate States, each State acting in its sovereign and independent character, in order to form a permanent federal government, establish justice, insure domestic tranquility, and secure the blessings of liberty to ourselves and our posterity invoking the favor and guidance of Almighty God do ordain and establish this Constitution for the Confederate States of America.”

Lectures indicated that to qualify as a planter in the Old South, one had to own fifty or more slaves.  Lectures also noted that nearly all free southerners were planters.

What Congressional event first indicated to northerners and southerners that their respective regions were significantly and disturbingly different?

In 1832, South Carolina nullified the federal tariff and refused to collect the tax.  President Andrew Jackson threatened to respond with force.   A civil war might have broken out at this point.  Why didn’t it, according to the lectures?

Abraham Lincoln was assassinated during the second year of the Civil War.