___________ are female pheromones that are secreted during ovulation.
a. Testosterone.
b. Estrogen.
c. Aesthetics.
d. Copulins.
Question 2
Which accessory olfactory system was recently determined to be active in humans?
a. Pineal gland.
b. Vomeronasal organ.
c. Olfactory bulb.
d. Vagus nerve.
