In the nucleus of every human cell, except for the sperm and ova, are __________ chromosomes

In rats, lateral attack is a component of __________ aggression

Fill in the blank with the appropriate word.

In the classical conditioning interpretation of drug tolerance, what is the unconditioned response?

a. The procedure of administering the drug b. The entry of the drug into the brain c. The social setting in which someone takes the drug d. The body's defenses against the drug