Testosterone levels in men appear to fluctuate in response to

a. internal biological clocks.
b. competition

A combined Apgar score of _____ or better indicates that an infant is in good physical condition

A) 4 B) 5 C) 6 D) 7

Goodness of fit is

A) only effective with sociable, securely attached children. B) rarely successful with difficult children. C) only effective with infants and toddlers. D) at the heart of infant–caregiver attachment.