What developmental characteristic does not occur until a child reaches age 2 1/2 years?
a. Birth weight has doubled.
b. Anterior fontanel is still open.
c. Primary dentition is complete.
d. Binocularity may be established.
ANS: C
Usually by age 30 months, the primary dentition of 20 teeth is complete. Birth weight doubles at approximately ages 5 to 6 months. The anterior fontanel closes at ages 12 to 18 months. Binocularity is established by age 15 months.
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Indicate whether the statement is true or false.