Your textbook described a classic experiment by robert rescorla that involved two groups of rats. one group of rats heard a tone just before each of 20 shocks. the second group of rats experienced the same 20 tone-shock pairings, but also experienced an additional 20 shocks that were not paired with a tone. how did the two groups differ

Which best describes california population when it became a state in 1850? a.because of the gold rush attracting settlers all over the world california population diverse.bcalifornia had banned foreign immigrants at the start of the gold rush.so,the states population was made up of entirely of americans from other parts of the country.c california had a large african population because many southern planters had moved their enslaved africans to start large farms.d the indian removal act had led to the relocation of thousands of eastern native americans to california.as,a result the majority of californias population was native american