involves a surge in sex hormones.”

driven to engage in these behaviors.

Obesity is associated with increased depression.

the behavior of a group is assessed by different researchers.”

influenced more by their environment than by their shared genes.”

produces a normal distribution of scores.

He will prefer sweet foods over salty foods.

the ability to learn from experience and solve problems.

parasympathetic nervous system is arousing him for action.

regulates an appetite hormone secreted by the stomach.