The human genome contains approximately ________ genes.
A) 5,000 to 10,000
B) 20,000 to 25,000
C) 50,000 to 75,000
D) 50,000 to 100,000
Question 2
In Pavlov's experiment with dogs, classical conditioning was demonstrated when
A) the UCS elicited the CR.
B) the UCS elicited the UCR.
C) the CS elicited the CR.
D) the CS was paired with the UCS.