Humans have ___ active odor receptor genes than rats and mice.
a. four times as many
b. fewer
c. the same number of
d. twice as many
Question 2
Officer Rosa hit the deck, knowing that the sudden sound was a gunshot and not a car backfiring, because of his _____.
a. ventral stream of auditory information analysis
b. dorsal stream of auditory information analysis
c. secondary auditory cortex
d. inferior colliculus and medial geniculate