The informant is completing a psychological testing through the use of checklist instrument to assess behavior. This develops an understanding and determines certain behaviors using variables which may become a basis for an explanation as it is compared with others. It also gives validity to findings that would be revealed after the tests.
Answer:
The division between the North and South.
Explanation:
They disagreed over slavery.
It also symbolizes the secession of the South from the Union because the Northern states opposed slavery.
To complete the sentence above, the answer is; activating
metabotropic glutamate receptors in rats was found to reverse the effects of
PCP.
The metabotropic glutamate receptors are the ones
responsible of having to modulate the synaptic transmissions while the PCP or
phencyclidine enables to produce effects that are dangerous and strong.