In developed countries, the primary cause of low birth weight is teratogens, such as smoking and alcohol.

The ____ approach emphasizes caring for the partner, regardless of what they provide in return

FIll in the blank with correct word.

Correlations between aggressive behavior and testosterone levels do not necessarily mean that high testosterone levels cause aggressive behavior because

A) social aggression occurs only in males. B) the effects of estradial cannot be ruled out. C) aggressive encounters often cause increases in testosterone levels. D) humans and rats differ in their sex hormones. E) aggressive behavior is controlled by the amygdala.