a. true b. false
Answer: b. false
The average ratio of time awake to time asleep is
a. 1 to 1. b. 2 to 1. c. 3 to 1. d. unknown.
Most girls reach their maximum height by age ______, and most boys reach their maximum height by age ______
14; 16 16; 14 16; 18 18; 16
