What is the basic difference between the terms age set and age grade?
What will be an ideal response?
Question 2
In Old World monkeys, the swelling and changes in the color of the skin surrounding the female's genital area is a(n):
a. sign also found in all monkeys.
b. indication of a diseased state.
c. indication of estrus.
d. sign of aggression.
e. a visual cue of a female's readiness to become aggressive.