After all five of her children struck out on their own, Naomi made sure everyone stayed in touch by creating a family blog. She also took charge of gathering the family for celebrations. Naomi is her family's

An example of homeostasis is the

increase in maximum heart rate with age. reserve that allows a person to do without a night of sleep. increase in heart rate and breathing that occurs during physical exertion. loss of muscle tone that occurs in the absence of exercise.

Which of the following is an example of a quantitative variable?

a. gender b. make of automobile (e.g., Ford, Chevy) you drive c. eye color d. height