Complete the following sentence. A human's most rapid growth, both physically and mentally, occurs between and years old.

Which of the following is a true statement? a. the male sex hormone is called estrogen. b. the female sex hormone is called testosterone. c. both sexes manufacture some amount of the sex hormone associated with the opposite sex. d. only males secrete testosterone and only females secrete estrogen

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

In the 2010 ncaa men's lacrosse annual meeting, a rule change regarding "get it in/keep it in" was added to what section?