Cancer of the testicles occurs mainly in men aged 15 to 34

Cheng stared at his one-month-old son, who seemed so perfect. When awake, the baby seemed to almost always be active. Cheng wondered how much of this behavior was deliberate. Reflexes control ________ of newborn behavior

a. much b. all c. a little bit d. none

A variable interval schedule is best described as providing reinforcement after

a. a certain number of correct responses are made. b. any number of correct responses is made. c. varying spans of time. d. a set amount of time passes.