A good example of a qualitative change in physical development that occurs during childhood is:
a. a 5-year-old practices the steps and eventually ties her shoes independently.
b. an 8-year-old gains 15 pounds over the course of a year.
c. a 9-year-old becomes better able to walk on a balance beam due to a change in his center of gravity.
d. a 6-year-old joins a soccer team and rapidly develops new skills at kicking.
Question 2
Three-month-old Mary Jo can hold her head up when in the arms of an adult, but she doesn't yet have much control of what her legs do. Which one of the following best describes Mary Jo's progression in muscular control?
a. It shows a definite delay in fine motor skills.
b. It shows a cephalocaudal trend, which is typical.
c. It shows a proximodistal trend, which is not typical.
d. It suggests that Mary Jo will probably be a good student but a poor athlete.
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